A flexible adjustable pressure knee distraction device

Abstract

The application provides a flexible adjustable pressure knee joint distraction device, and belongs to the technical field of knee joint auxiliary treatment. The device comprises a handle, an inner cavity is formed in the handle, a flexible distraction mechanism is fixedly installed at one end of the handle, and a rigid distraction mechanism is fixedly installed at the other side of the handle. The flexible distraction mechanism of the application uses a flexible water supply assembly to gently and stably distract the knee joint by water pressure, can conform to the shape of the bone, and can accurately control the pressure. The rigid distraction mechanism is used when the flexible mechanism fails, and through a clever clamping structure and a transmission assembly, reliable rigid distraction is realized. The pressure is accurately fed back by a tension sensor, which is convenient for doctors to accurately operate. The two complement each other, so that the device can flexibly cope with different patients, operation stages and complex distraction requirements, and provide a comprehensive and reliable distraction scheme for knee joint replacement and other operations, and effectively improve the operation safety and success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of knee joint auxiliary treatment, and more particularly to a knee joint distraction device with flexible and adjustable pressure. Background Art

[0002] Currently, in total knee replacement surgery, accurately determining the final position of the prosthesis is crucial. Among them, distracting the gap between the tibia and femur of the knee joint and determining the osteotomy position of the tibia and femur based on the deformation of the gap under the action of appropriate distraction force are key links in the operation. However, a major problem currently faced is that there is no clear and accurate quantitative standard for this "appropriate distraction force", which relies entirely on the surgeon's personal experience and lacks an effective knee distraction device that can accurately measure the distraction force.

[0003] The existing distraction devices have obvious shortcomings. Although one type has the distraction function, it is impossible to know the magnitude of the force applied during the distraction process, which makes it difficult for doctors to accurately control the distraction force and affects the accuracy of the surgical effect; the other type is made in the form of a pressure gasket. Although it can measure the pressure it bears, it is limited to use after osteotomy. It is unable to judge the distraction situation of the gap before osteotomy and cannot provide a sufficient basis for determining the osteotomy position. At the same time, the existing technology mostly uses a clamp-type rigid distraction method to assist in knee joint distraction. When the knee joint is moved after distraction, the rigid distraction structure lacks the ability to adapt to deformation, which easily causes the distractor to slip, and the pressure regulating device is also inconvenient and unstable during use. It can be seen that the existing distraction device cannot have both flexible and rigid distraction functions, and has certain defects and shortcomings in overall use, so it needs to be improved and designed. Summary of the Invention

[0004] In view of the problem in the prior art that it is impossible to achieve both rigid distraction and flexible distraction and to flexibly control the distraction pressure, the purpose of the present invention is to provide a knee distraction device with flexible and adjustable pressure.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A knee joint distraction device with flexible and adjustable pressure includes a handle, an inner cavity is defined within the handle, a flexible distraction mechanism is fixedly mounted on one end of the handle, a rigid distraction mechanism is fixedly mounted on the other end of the handle, a linkage mechanism is provided within the inner cavity, two sides of the linkage mechanism are respectively linked to the rigid distraction mechanism and the flexible distraction mechanism, a handle slot is defined on the back of the handle, a controller is mounted within the handle slot, a touch screen is provided on one side of the back of the controller, and control buttons are provided on the other side of the back of the controller;

[0007] The linkage mechanism includes a drive component, a flexible water supply component and a rigid linkage component. The drive component is fixedly installed in the middle of the top of the handle. The flexible water supply component is arranged on the side of the inner cavity close to the flexible expansion mechanism. The rigid linkage component is arranged inside the inner cavity close to the side of the rigid expansion mechanism. The output end of the flexible water supply component is connected to the flexible expansion mechanism, the rigid linkage component is linked to the rigid expansion mechanism, and the drive component and the rigid linkage component are transmission connected.

[0008] Optionally, the drive assembly includes a mounting slot, which is opened in the middle of the top of the handle, a frame is fixedly installed inside the mounting slot, a first gear is rotatably connected between the inner sides of the frame, a drive motor is fixedly installed on the side of the frame, the output end of the drive motor is connected to the first gear, the first gear is transmission-connected to the rigid linkage assembly, an outer protective shell is fixedly installed on the inner side of the frame, the outer protective shell covers the outer side of the first gear, and the first gear is rotatably installed inside the outer protective shell.

[0009] Optionally, the rigid linkage component includes a first slide groove, the top of the first slide groove is connected to the interior of the mounting groove, the first slide groove is opened at the top of the inner cavity, the interior of the first slide groove is slidably connected to a slide, the inner side of the slide is fixedly connected to a first rack, the top of the first rack is meshed with the first gear, and the bottom of the slide is fixedly installed with an extrusion frame, and the extrusion frame is arranged in a right triangle shape on the side close to the flexible water supply component and the inclined surface is arranged at the bottom.

[0010] Optionally, the flexible water supply component includes a water supply elastic water bag, which is fixedly installed in the inner cavity at one end away from the extrusion frame. A connecting tube is fixedly installed on the side of the water supply elastic water bag away from the rigid expansion mechanism. The input end of the connecting tube is connected to the water supply elastic water bag, and the output end of the connecting tube is connected to the flexible expansion mechanism.

[0011] Optionally, the flexible expansion mechanism includes a connecting frame, which is fixedly mounted on one end of the handle away from the rigid expansion mechanism, and a receiving plate is fixedly mounted on the outer end of the connecting frame, and an expansion elastic water bag is fixedly mounted on the top and bottom of the receiving plate, and the input end of the expansion elastic water bag is connected to the output end of the connecting pipe, and a water pressure sensor is fixedly mounted on the back of the connecting frame, and the detection end of the water pressure sensor is arranged inside the connecting pipe.

[0012] Optionally, the rigid expansion mechanism includes a mounting frame, which is fixedly mounted on the side of the handle away from the flexible expansion mechanism, the expansion component is fixedly mounted on the outer end of the mounting frame, and the docking component is fixedly mounted on the side of the expansion component close to the handle, the docking component is arranged on the inner side of the mounting frame, and the docking component is connected to the outer end of the tension sensor.

[0013] The cam is fixedly mounted on the outside of the mounting frame, and the rail frame is rotatably connected to a screw rod inside the rail frame, and the threads at both ends of the screw rod are rotated in opposite directions, and the two ends of the screw rod are threadedly connected to a movable block, and the movable block is slidably connected to the inside of the rail frame, and the movable block is fixedly connected to the stretching clamp arm on the side away from the handle, and the outer end of the stretching clamp arm is fixedly connected to the anti-slip clamp plate. A transmission assembly is provided in the middle of the rail frame, and the end of the transmission assembly close to the handle is connected to the docking assembly, and the transmission assembly includes a sliding frame and a second gear, and the sliding frame is slidably connected to the middle of the mounting frame, and one side of the sliding frame is fixedly connected to the second rack, and the second gear is fixedly connected to the middle of the screw rod, and the second rack is meshed with the second gear, and the side of the sliding frame close to the handle is connected to the docking assembly.

[0014] Optionally, the docking assembly includes a side rail and a docking block, the side rail is fixedly mounted on one end of the frame close to the handle, and telescopic springs are fixedly mounted on both ends of the inner side of the side rail, the docking block is fixedly connected to one end of the tension sensor close to the rail frame, and a slot is provided on both sides of the docking block, the outer end of the telescopic spring is fixedly connected to a sliding block, and the sliding block is fixedly connected to a card block on the side close to the tension sensor, and the card block is inserted into the interior of the card slot, and the overall top-down shape of the interior of the card slot is a right-angled trapezoid, and the top-down shape of the outer end of the card block is also an isosceles trapezoid, the inclined surface of the card block is set on the side close to the docking block, and the top of the sliding block is fixedly connected to a push plate.

[0015] The cam is provided with a spring which is adapted to move the push rod relative to the push rod and the push rod relative to the push rod, and the cam is provided with a spring which is adapted to move the push rod relative to the push rod.

[0016] Optionally, the dislocation assembly includes an L-shaped block, a movable plate and a first movable column arranged in a cavity, one end of the first movable column is fixedly connected to the second wedge-shaped block, the other end of the first movable column passes through the side behind the L-shaped block and is fixedly connected to the second movable column, an adjustment slot is provided on the movable plate, and the adjustment slot is matched with the second movable column, the bottom of both ends of the movable plate are fixedly connected to a third movable column, one end of each of the third movable columns passes through a sliding connection limit block, the limit block is fixedly installed in the cavity of the movable column, the side of the movable plate away from the L-shaped block of the movable column is fixedly connected to a connecting rod, the connecting rod passes through and extends to one end of the third sliding slot of the movable column and is fixedly connected to the first slider of the movable column, and the first slider is fixedly connected to the movable column extrusion frame. Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0017] In the above scheme, the flexible water supply component is coordinated with the flexible expansion mechanism. In actual use, the first gear can be driven to rotate by starting the driving motor, and the slide is driven to slide smoothly in the first slide groove by means of the gear rack engagement transmission. The extrusion frame at the bottom of the slide effectively squeezes the water supply elastic water bag through a special inclined structure, so that the water flows into the expansion elastic water bag through the connecting pipe. As the expansion elastic water bag gradually expands, its surface area increases, which can gently and effectively expand the knee joint. The operation is simple. Just place the unexpanded receiving plate on the knee joint and start the motor to achieve expansion. The flexibility of the expansion elastic water bag enables it to automatically deform according to the shape of the knee joint bones, thereby enhancing the expansion stability and preventing the device from falling off. At the same time, the water pressure sensor monitors the pressure in real time, and the doctor can flexibly adjust the expansion pressure accordingly to improve the convenience and accuracy of the operation.

[0018] A rigid expansion mechanism is adopted, so that when rigid and rapid expansion is required during use, it can be quickly switched to the rigid expansion mode. When activated, the tension sensor can be pulled toward the card block, and the card block is squeezed to cause the sliding block to slide and squeeze the telescopic spring. After the docking block is in place, the telescopic spring resets and pushes the card block into the card slot, firmly connecting the slide frame and the tension sensor. After starting the drive motor, the slide drives the tension sensor and the slide frame to move, and the slide frame drives the second gear, which drives the screw to rotate, and the anti-slip clamp plate at the end of the expansion clamp arm is placed at the knee joint. Through the gear rack transmission, the screw drives the movable block, which drives the expansion clamp arm to expand the knee joint.

[0019] This device is equipped with two expansion functions, flexible and rigid, which can further improve the adaptability of the device. The flexible expansion mechanism relies on the flexible water supply component to use water pressure to achieve gentle, stable and bone-fitting expansion, and can precisely control the pressure. The rigid expansion mechanism plays a role when the flexible mechanism cannot work. Through the clever clamping structure and transmission components, reliable and stable rigid expansion is achieved, and the expansion pressure can be accurately fed back through the tension sensor, which is convenient for the doctor to precisely control. The two modes work together to enable the device to flexibly respond to different patients, different surgical stages and various complex expansion needs, providing a more comprehensive and reliable expansion solution for related medical operations such as total knee replacement surgery, which greatly improves the safety and success rate of the operation.

[0020] By cooperating with the switching component and the error component, the extrusion frame and the water supply elastic water bag can be misaligned when the rigid expansion mechanism is used, preventing the flexible expansion mechanism from being activated when the rigid expansion mechanism is working, so that the rigid expansion mechanism and the flexible expansion mechanism do not interfere with each other during flexible switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0024] Figure 3 This is a schematic structural diagram of one end of the flexible expansion mechanism of the present invention;

[0025] Figure 4 This is a schematic structural diagram of one end of the present invention close to the rigid expansion mechanism;

[0026] Figure 5 It is a schematic diagram of the top view of the structure of the present invention;

[0027] Figure 6 Schematic diagram of the internal structure of the present invention;

[0028] Figure 7 For the present invention Figure 4 A schematic diagram of the enlarged structure at point A;

[0029] Figure 8 For the present invention Figure 5 A schematic diagram of the enlarged structure at point B;

[0030] Figure 9 For the present invention Figure 6 Schematic diagram of the enlarged structure at C;

[0031] Figure 10 For the present invention Figure 6 A schematic diagram of the structure at D of FIG.

[0032] Figure 11 Schematic diagram of the internal structure of the movable frame of the present invention;

[0033] Figure 12 It is a structural schematic diagram of the dislocation component of the present invention.

[0034] [Reference Signs]

[0035] 1. Handle;

[0036] 2. Rigid expansion mechanism; 21. Mounting frame;

[0037] 22. Spreading assembly; 221. Rail frame; 222. Screw rod; 223. Movable block; 224. Spreading clamp arm; 225. Anti-slip clamp plate;

[0038] 23. Docking assembly; 231. Side rail; 232. Docking block; 233. Telescopic spring; 234. Slot; 235. Sliding block; 236. Block; 237. Push plate;

[0039] 3. Flexible expansion mechanism; 31. Connecting frame; 32. Adapter plate; 33. Expandable elastic water bag; 34. Water pressure sensor;

[0040] 4. Inner cavity;

[0041] 5. Linkage mechanism;

[0042] 51. Drive assembly; 511. Mounting slot; 512. Frame; 513. First gear; 514. Drive motor; 515. Outer protective shell;

[0043] 52. Flexible water supply assembly; 521. Water supply elastic water bag; 522. Connecting pipe;

[0044] 53, rigid linkage assembly; 531, first chute; 532, slide; 533, first rack; 534, movable frame; 535, extrusion frame; 536, first slide; 537, second chute; 538, second slide;

[0045] 54. Switching assembly; 541. Tension sensor; 542. Electric telescopic rod; 543. Adjusting rod; 544. First wedge block; 545. Extrusion spring; 546. Second wedge block; 547. Third chute;

[0046] 55. Dislocation assembly; 551. L-shaped block; 552. First movable column; 553. Second movable column; 554. Moving plate; 555. Adjustment slot; 556. Limit block; 557. Third movable column; 558. Connecting rod;

[0047] 6. Transmission assembly; 61. Sliding frame; 62. Second rack; 63. Second gear;

[0048] 7. Handle slot; 8. Controller; 9. Touch screen; 10. Control buttons.

[0049] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0051] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0052] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0053] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0054] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0055] like Figures 1 to 12As shown, an embodiment of the present invention provides a knee joint distraction device with flexible and adjustable pressure, comprising a handle 1, an inner cavity 4 being opened inside the handle 1, a flexible distraction mechanism 3 being fixedly installed at one end of the handle 1, a rigid distraction mechanism 2 being fixedly installed at the other end of the handle 1, a linkage mechanism 5 being provided inside the inner cavity 4, and the two sides of the linkage mechanism 5 being linked to the rigid distraction mechanism 2 and the flexible distraction mechanism 3 respectively, a handle slot 7 being opened on the back of the handle 1, a controller 8 being installed inside the handle slot 7, a touch screen 9 being provided on one side of the back of the controller 8, and a control button 10 being provided on the other side of the back of the controller 8. The linkage mechanism 5 includes a drive assembly 51, a flexible water supply assembly 52 and a rigid linkage assembly 53. The drive assembly 51 is fixedly installed in the middle of the top of the handle 1. The flexible water supply assembly 52 is arranged on the side of the inner cavity 4 close to the flexible expansion mechanism 3. The rigid linkage assembly 53 is arranged on the side of the inner cavity 4 close to the rigid expansion mechanism 2. The output end of the flexible water supply assembly 52 is connected to the flexible expansion mechanism 3. The rigid linkage assembly 53 is linked to the rigid expansion mechanism 2. The drive assembly 51 and the rigid linkage assembly 53 are connected in a transmission manner. The flexible expansion mechanism 3 of this device is driven by a gear rack transmission with the help of a drive motor 514, and the water supply elastic water bag 521 is squeezed to fill the expansion elastic water bag 33 with water to achieve expansion. The expansion elastic water bag 33 has good flexibility and can deform according to the shape of the bone, thereby enhancing the expansion stability and preventing it from falling off. The water pressure sensor 34 can monitor the pressure in real time and flexibly adjust it through the drive motor 514. The rigid expansion mechanism 2 is easy to switch. The drive motor 514 is started again, and the expansion is achieved by transmission using the rack and pinion and the screw 222. The tension sensor 541 detects the tension in real time. The doctor accurately controls the expansion pressure by controlling the drive motor 514. The two mechanisms work together to greatly improve the operational stability, convenience, accuracy and adaptability of the device.

[0056] like Figures 1 to 7 and Figure 9 As shown, the drive assembly 51 includes a mounting slot 511, which is located in the middle of the top of the handle 1. A frame 512 is fixedly installed inside the mounting slot 511, and a first gear 513 is rotatably installed between the inner sides of the frame 512. A drive motor 514 is fixedly installed on one side of the frame 512, and the output end of the drive motor 514 is connected to the first gear 513. The first gear 513 is transmission-connected to the rigid linkage assembly 53, and an outer protective shell 515 is fixedly installed on the inner side of the frame 512. The outer protective shell 515 covers the outer side of the first gear 513, and the first gear 513 is rotatably connected to the inner side of the outer protective shell 515. In this knee joint distraction device, the frame 512 is located in the mounting slot 511, and the first gear 513 is rotatably connected to the inner side of the frame 512. The drive motor 514 installed on one side of the frame 512 has its output end firmly connected to the first gear 513.

[0057] When the doctor issues an instruction through the controller 8 in the handle slot 7 on the back of the handle 1, the drive motor 514 responds quickly and starts to operate. The torque generated by the operation of the drive motor 514 is directly transmitted to the first gear 513, driving the first gear 513 to rotate inside the frame 512. Since the first gear 513 is in transmission connection with the rigid linkage assembly 53, the rotating first gear 513 can transmit power to the rigid linkage assembly 53, thereby driving the rigid expansion mechanism 2 to work. To ensure the stable operation of the first gear 513, an outer protective shell 515 is also fixedly installed on the inside of the frame 512. The outer protective shell 515 tightly covers the outside of the first gear 513. The first gear 513 rotates inside the outer protective shell 515. The outer protective shell 515 not only protects the first gear 513 from interference from the external environment, but also prevents debris from entering during surgery and affecting the operation of the gears, ensuring that the drive assembly 51 can continuously and stably provide power support for the expansion operation of the device.

[0058] like Figures 1 to 6 and Figures 8 to 10 As shown, the rigid linkage component 53 includes a first slide groove 531, the top of the first slide groove 531 is connected to the interior of the mounting groove 511, the first slide groove 531 is opened at the top of the inner cavity 4, the interior of the first slide groove 531 is slidably connected to a slide 532, the slide 532 is fixedly connected to a first rack 533, the first rack 533 and the first gear 513 are meshed and connected, and an extrusion frame 535 is fixedly installed at the bottom of the slide 532, and the extrusion frame 535 is arranged in a right triangle on the side close to the flexible water supply component 52 and the inclined surface is arranged at the bottom (as shown in FIG. Figure 9 As shown), the tension sensor 541 (as Figure 8 The end portion of the extrusion frame 535 is linked to the rigid expansion mechanism 2.

[0059] like Figure 2 and Figure 6 As shown, the flexible water supply component 52 includes a water supply elastic water bag 521, and the water supply elastic water bag 521 is installed in the inner cavity 4. A connecting pipe 522 is fixedly installed on the side of the water supply elastic water bag 521 away from the rigid expansion mechanism 2. The output end of the connecting pipe 522 is connected to the flexible expansion mechanism 3, and the input end of the connecting pipe 522 is connected to the water supply elastic water bag 5213. The flexible expansion mechanism 3 includes a connecting frame 31, and the connecting frame 31 is fixedly installed on the end of the handle 1 away from the rigid expansion mechanism 2. A receiving plate 32 is fixedly installed on the outer end of the connecting frame 31, and the top and bottom of the receiving plate 32 are fixedly installed with expansion elastic water bags 33. The input end of the expansion elastic water bag 33 is connected to the output end of the connecting pipe 522. A water pressure sensor 34 is fixedly installed on the back of the connecting frame 31. The water pressure sensor 34 (such as Figure 2 The detection end of the device 510 is arranged inside the connecting pipe 522. When the driving motor 514 is started and drives the first gear 513 to rotate, the rigid linkage component 53 starts to operate, and the first gear 513 is engaged with the first rack 533 fixed on the inner side of the slide 532, so that the slide 532 slides in the first slide groove 531, and the extrusion frame 535 at the bottom of the slide 532 moves accordingly. It is close to the right-angled triangle structure of the flexible water supply component 52, and the bottom inclined surface can efficiently squeeze the water supply elastic water bag 521 to make the flexible water supply component 52 work. When the flexible water supply component 52 works, the squeezed water supply elastic water bag 521 transports water to the flexible expansion mechanism 3 through the connecting pipe 522.

[0060] Specifically, the connecting frame 31 is fixed to one end of the handle 1, and its outer end receives the elastic water bags 33 at the top and bottom of the receiving plate 32, and receives water from the water supply elastic water bag 521 through the connecting tube 522, thereby expanding and expanding the knee joint. The detection end of the water pressure sensor 34 on the back of the connecting frame 31 is placed in the connecting tube 522, which monitors the water pressure in real time and feeds back information to accurately control the flexible expansion force. The entire system works together to achieve effective expansion operation of the knee joint.

[0061] like Figures 1 to 6 and Figure 10 As shown, the rigid expansion mechanism 2 includes a mounting frame 21, which is fixedly mounted on the side of the handle 1 away from the flexible expansion mechanism 3. The outer end of the mounting frame 21 is fixedly mounted with an expansion component 22, and the side of the expansion component 22 close to the handle 1 is fixedly mounted with a docking component 23. The docking component 23 is arranged on the inner side of the mounting frame 21 and is connected to the outer end of the tension sensor 541. Figure 4 and Figure 10 As shown, the expansion assembly 22 includes a rail frame 221, which is fixedly mounted on the outside of the mounting frame 21. A screw rod 222 is rotatably mounted inside the rail frame 221. The two ends of the screw rod 222 have threads that rotate in opposite directions. Both ends of the screw rod 222 are threadedly connected to a movable block 223. The movable block 223 is slidably mounted inside the rail frame 221. The side of the movable block 223 away from the handle 1 is fixedly connected to an expansion clamp arm 224. The outer end of the expansion clamp arm 224 is fixedly connected to an anti-slip clamp plate 225. A transmission assembly 6 is provided in the middle of the rail frame 221. The end of the transmission assembly 6 near the handle 1 is connected to the docking assembly 23.

[0062] like Figure 10As shown, the transmission assembly 6 includes a slide frame 61 and a second gear 63. The slide frame 61 is slidably connected to the middle part of the mounting frame 21. A second rack 62 is fixedly connected to the inner side of the slide frame 61. The second gear 63 is fixedly connected to the middle part of the screw rod 222. The second rack 62 and the second gear 63 are meshed and connected. The side of the slide frame 61 close to the handle 1 is connected to the docking assembly 23. Figure 8 As shown, the docking assembly 23 includes a side rail 231 and a docking block 232. The side rail 231 is fixedly installed on the end of the frame 512 close to the handle 1. The two ends of the inner side rail 231 are connected to one end of the telescopic spring 233. The docking block 232 is fixedly connected to the end of the tension sensor 541 close to the rail frame 221. A slot 234 is provided on both sides of the docking block 232. The other end of the telescopic spring 233 is fixedly connected to a sliding block 235. The sliding block 235 is fixedly connected to a block 236 on the side close to the tension sensor 541. The block 236 is inserted into the interior of the slot 234. The overall shape of the interior of the slot 234 is a right-angled trapezoid when viewed from above. The outer end of the block 236 is also an isosceles trapezoid when viewed from above. The inclined surface of the block 236 is set on the side close to the docking block 232. The top of the sliding block 235 is fixedly connected to a push plate 237.

[0063] When the rigid expansion mechanism 2 needs to be activated, as the tension sensor 541 moves, the docking block 232 approaches the clamping block 236. The outer end of the clamping block 236 is an isosceles trapezoid and the inclined surface is close to the docking block 232. When the docking block 232 contacts the inclined surface of the clamping block 236, under the oblique force, the docking block 232 expands the clamping block 236 and moves it to both sides. The clamping block 236 pushes the sliding block 235 to compress the telescopic spring 233 in the side rail 231, so that the clamping block 236 has a certain retraction and tightening force. When the docking block 232 continues to move forward, it moves to The front end of the card block 236 is accurately inserted into the card slot 234 to achieve a stable connection between the docking block 232 and the card block 236, and then the tension sensor 541 is connected to the docking assembly 23; when the rigid support mechanism 2 is not in use, the push plate 237 is pushed to both sides by hand to disengage the card block 236 from the card slot 234, and the tension sensor 541 is moved backward until the card block 236 disengages from the card slot 234 on the docking block 232. At this time, the telescopic spring 233 is reset, driving the card block 236 to reset, so that the card block 236 and the docking block 232 are completely separated.

[0064] When the driving motor 514 drives the first gear 513 to rotate and the first rack 533 engaged with the first gear 513 drives the slide 532 to slide in the first slide groove 531, the bottom squeeze frame 535 of the slide 532 pushes the movable frame 534, so that the tension sensor 541 connected thereto moves. Since the tension sensor 541 is connected to the docking assembly 23, the tension sensor 541 drives the docking block 232 to move, and the docking block 232 pulls the slide frame 61 to slide in the middle of the mounting frame 21. The second rack 62 on one side of the slide frame 61 engages with the second gear 63 fixed in the middle of the screw rod 222, and the slide frame 61 slides to drive the second rack 62 on the other side of the slide frame 61. The second gear 63 rotates, thereby driving the screw rod 222 to rotate in the rail frame 221. Since the threads at both ends of the screw rod 222 rotate in opposite directions, when the screw rod 222 rotates, the movable blocks 223 threaded at both ends slide in opposite directions in the rail frame 221, driving the expansion clamp arm 224 fixed thereto to move, and the anti-slip clamp plate 225 at the outer end of the expansion clamp arm 224 gradually opens outward to achieve a rigid expansion operation of the knee joint. The entire process is achieved stably and effectively through precise mechanical transmission between the various components, and the design of the tension sensor 541 can detect the tension in real time, which facilitates the doctor to better control the force.

[0065] like Figure 6 、 Figure 9 、 Figure 11 and Figure 12As shown, a movable frame 534 and a tension sensor 541 are provided at one end of the extrusion frame 535, distal from the flexible expansion mechanism. A cavity is defined within the movable frame 534, within which a switching assembly 54 is located. The switching assembly 54 includes an electrically operated telescopic rod 542 disposed within the cavity. An adjustment rod 543 is fixedly connected to the output end of the electrically operated telescopic rod 542. One end of the adjustment rod 543 passes through the movable frame 534 and is fixedly connected to the tension sensor 541. First wedge blocks 544 are fixedly connected to the upper and lower sides of the adjustment rod 543. A sliding rod is disposed within the cavity, with second wedge blocks 546 slidably connected to each end of the sliding rod. Each second wedge block 546 is mated with a corresponding first wedge block 544. Extrusion springs 545 are sleeved around the outer sides of the sliding rod, with the ends of the two extrusion springs 545 fixedly connected to the corresponding second wedge blocks 546. A dislocation assembly 55 is provided on one side of each of the two second wedge blocks 546 , and two third sliding grooves 547 are provided on a side of the movable frame 534 close to the extrusion frame 535 . The dislocation assembly 55 includes an L-shaped block 551, a movable plate 554 and a first movable column 552 arranged in the cavity, one end of the first movable column 552 is fixedly connected to the second wedge block 546, and the other end of the first movable column 552 is fixedly connected to the second movable column 553 on the side after passing through the L-shaped block 551. The movable plate 554 is provided with an adjustment slot 555, and the adjustment slot 555 is matched with the second movable column 553. The bottom of both ends of the movable plate 554 is fixedly connected to a third movable column 557, and one end of each of the third movable columns is slidably installed on a limit block 556, and the limit block 556 is fixedly installed in the cavity. The movable plate 554 is fixedly connected to a connecting rod 558 on the side away from the L-shaped block 551, and the connecting rod 558 is fixedly connected to the first slider 536 at one end extending to the third sliding groove 547, and the first slider 536 is fixedly connected to the extrusion frame 535. Specifically, a second slide groove 537 is provided on the extrusion frame 535, and a second slider 538 is provided at the bottom of the slider 532. The second slide groove 537 and the second slider 538 are used in conjunction with each other, and the two extrusion frames 535 are respectively connected to a first slider 536.

[0066] When it is necessary to quickly switch to the rigid expansion mechanism 2, specifically, the electric telescopic rod 542 drives the tension sensor to move through the adjusting rod 543 until the docking block 232 continues to move forward until the front end of the card block 236 is accurately inserted into the card slot 234, thereby realizing a stable connection between the docking block 232 and the card block 236. During the movement of the adjusting rod 543, the first wedge block 544 is simultaneously driven to move and squeeze the second wedge block 546 to move along the slide rod. When the second wedge block 546 moves, it will drive the first movable column 552 to slide along the L-shaped block 551 and drive the second movable column 553 to move on the adjusting slot 555 on the movable plate 554. Since the adjusting slot 555 is curved, The linear arrangement allows the second movable column 553 to drive the movable plate 554 through the adjustment slot 555 to move horizontally on the limit block 556 through the third movable column 557. The horizontal movement of the movable plate 554 drives the connecting rod 558 and then drives the extrusion frame 535 to move through the cooperation of the first slider 536 and the third slide slot 547, so that the two extrusion frames 535 are separated or closed. When the two extrusion frames 535 are separated, the extrusion frames 535 and the water supply elastic water bag 521 are misaligned, which can prevent the rigid expansion mechanism 2 from causing the flexible expansion mechanism 3 to be activated when working, thereby ensuring that the rigid expansion mechanism 2 and the flexible expansion mechanism 3 do not interfere with each other during flexible switching.

[0067] The workflow of the technical solution provided by the present invention is as follows:

[0068] The present device can effectively improve the stability and convenience of the knee joint expansion operation by setting a flexible water supply component 52 and cooperating with the flexible expansion mechanism 3. In actual use, the driving motor 514 is started, and the operation of the motor drives the first gear 513 in the first slide groove 531 to rotate. Since the first gear 513 is engaged with the first rack 533, the rotation of the first gear 513 drives the first rack 533, and then drives the slide 532 to slide smoothly in the first slide groove 531. The bottom of the slide 532 is connected to the extrusion frame 535, and the extrusion frame 535 is connected to the extrusion frame 536. The side of 35 close to the water supply elastic water bag 521 is designed as a slope structure. When the slide 532 drives the squeezing frame 535 to move, the slope can effectively squeeze the water supply elastic water bag 521. After the water supply elastic water bag 521 is squeezed, the water stored inside is accurately transported to the expanded elastic water bag 33 at the top and bottom of the receiving plate 32 outside the connecting frame 31 through the connecting tube 522. As the expanded elastic water bag 33 is filled with water, it gradually expands and its surface area increases, thereby gently and effectively expanding the patient's knee joint.

[0069] During the operation, it is only necessary to carefully place the unexpanded receiving plate 32 on the knee joint, and then start the driving motor 514. The motor drives the first gear 513 to drive the first rack 533, prompting the slide 532 to slide in the first slide groove 531, and then push the extrusion frame 535 to apply pressure to the water supply elastic water bag 521. The water fills the elastic water bag 33 through the connecting tube to achieve adaptive expansion of the knee joint. It is worth mentioning that the expansion elastic water bag 33 has good flexibility and can automatically deform according to the shape of the knee joint bone. It fits tightly to the knee joint during the expansion process, significantly enhancing the stability of the expansion and effectively avoiding the risk of accidental detachment of the device during the expansion process. In addition, during the expansion process, the water pressure sensor 34 monitors the pressure in the expansion elastic water bag 33 in real time. The doctor can flexibly adjust the expansion pressure according to the monitoring data, so that the device can accurately meet different expansion needs, further improving the convenience and accuracy of operation.

[0070] The present device is also equipped with a rigid expansion mechanism 2, which serves as a powerful supplement to the flexible expansion mechanism 3 and significantly enhances the adaptability of the device. When the flexible expansion mechanism 3 cannot work normally due to special circumstances, it can be quickly switched to the rigid expansion mechanism 2. When the rigid expansion mechanism 2 is enabled, the tension sensor 541 needs to be pulled toward the side of the card block 236. The card block 236 is an isosceles trapezoid, and its inner inclined surface is close to the docking block 232 of the tension sensor 541. When the docking block 232 contacts the inclined surface of the card block 236, the card block 236 is squeezed. Under the guiding action of the inclined surface, the sliding block 235 is prompted to slide and squeeze the telescopic spring 233, so that the telescopic spring 233 is in a stretched state. As the docking block 232 moves further to the inside of the card block 236, when the card block 236 contacts the card slot 234, the telescopic spring 233 resets, pushing the card block 236 to accurately insert into the card slot 234, thereby achieving a stable connection between the slide frame 61 and the tension sensor 541. After the docking block 232 and the card block 236 are successfully engaged, the drive motor 514 is started, and the motor drives the first gear 513 to rotate, driving the slide 532 to slide in the first slide groove 531. The slide 532 then pulls the tension sensor 541 to move. Since the card slot 234 of the docking block 232 and the card block 236 are firmly engaged, the slide 53 2 drives the tension sensor 541, and then drives the sliding frame 61 to move toward the side of the flexible expansion mechanism 3. The movement of the sliding frame 61 drives the second gear 63 to rotate, and the second gear 63 engages with the second rack 62, driving the screw rod 222 to rotate in the rail frame 221. During this process, the anti-slip clamp plate 225 at the end of the expansion clamp arm 224 is placed on the knee joint that needs to be expanded. As the sliding frame 61 slides, the second gear 63 and the second rack 62 continue to engage and transmit, and the screw rod 222 drives the movable block 223 to slide in the rail frame 221. Since the threads at both ends of the second screw rod 222 rotate in opposite directions, the movable block 223 can reciprocate synchronously. Displacement drives the spreading clamp arm 224 to move, so that the anti-slip clamp plate 225 at the end of the spreading clamp arm 224 moves outward, thereby realizing the spreading operation of the knee joint. During the spreading process, the tension sensor 541 detects the tension in real time. The tension value corresponds to the pressure applied by the spreading clamp arm 224. The doctor can flexibly and accurately control the spreading pressure of the spreading clamp arm 224 based on the data fed back by the tension sensor 541, which effectively improves the overall operation accuracy of the device and facilitates the precise control of the spreading force. By being equipped with both flexible spreading and rigid spreading functions, the device can flexibly respond to various complex spreading requirements and demonstrate strong adaptability.

[0071] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flexible and pressure-adjustable knee joint distraction device, comprising a handle, characterized in that: The handle has an inner cavity, a flexible expansion mechanism is fixedly mounted on one end of the handle, and a rigid expansion mechanism is fixedly mounted on the other end of the handle. A linkage mechanism is provided inside the inner cavity, and the two sides of the linkage mechanism are respectively linked to the rigid expansion mechanism and the flexible expansion mechanism. A handle slot is provided on the back of the handle, and a controller is installed inside the handle slot. A touch screen is provided on one side of the back of the controller, and control buttons are provided on the other side of the back of the controller. The linkage mechanism includes a drive assembly, a flexible water supply assembly and a rigid linkage assembly. The drive assembly is fixedly installed in the middle of the top of the handle. The flexible water supply assembly is arranged on the side of the inner cavity close to the flexible expansion mechanism. The rigid linkage assembly is arranged inside the inner cavity on the side close to the rigid expansion mechanism. The output end of the flexible water supply assembly is connected to the flexible expansion mechanism. The rigid linkage assembly and the rigid expansion mechanism are linked. The drive assembly and the rigid linkage assembly are in transmission connection. The driving component includes a mounting slot, the rigid linkage component includes a first slide slot, the top of the first slide slot is connected to the interior of the mounting slot, the first slide slot is opened at the top of the inner cavity, the interior of the first slide slot is slidably connected to a slide, the bottom of the slide is fixedly installed with an extrusion frame, the extrusion frame is provided with a movable frame and a tension sensor at one end away from the flexible expansion mechanism, the end of the tension sensor passes through the extrusion frame and is linked to the rigid expansion mechanism, a cavity is opened inside the movable frame, a switching component is provided in the cavity, the switching component includes an electric telescopic rod arranged in the cavity, the electric telescopic rod The output end of the rod is fixedly connected to an adjusting rod, one end of the adjusting rod passes through the movable frame and is fixedly connected to the tension sensor, the upper and lower sides of the adjusting rod are fixedly connected to the first wedge block, a sliding rod is provided in the cavity, both ends of the sliding rod are penetrated by a second wedge block for sliding connection, each second wedge block is respectively matched with the corresponding first wedge block, and an extrusion spring is sleeved on the outer side of both ends of the sliding rod, one end of the two extrusion springs is fixedly connected to the corresponding second wedge block, and a dislocation component is provided on one side of the two second wedge blocks, and two third sliding grooves are provided on the side of the movable frame close to the extrusion frame.

2. The flexible and pressure-adjustable knee joint distraction device according to claim 1, characterized in that: The mounting groove is opened in the middle of the top of the handle, and a frame is fixedly installed inside the mounting groove. The first gear is rotatably connected between the inner sides of the frame, and a driving motor is fixedly installed on the side of the frame. The output end of the driving motor is connected to the first gear, and the first gear is transmission-connected to the rigid linkage assembly. An outer protective shell is fixedly installed on the inner side of the frame, and the outer protective shell covers the outer side of the first gear. The first gear is rotatably installed inside the outer protective shell.

3. The flexible and pressure-adjustable knee joint distraction device according to claim 2, characterized in that: A first rack is fixedly connected to the inner side of the slide, and the top of the first rack is meshed with the first gear. The side of the extrusion frame close to the flexible water supply component is arranged in a right triangle with an inclined surface arranged at the bottom.

4. The flexible and pressure-adjustable knee joint distraction device according to claim 3, characterized in that: The flexible water supply component includes an elastic water bag for water supply, which is fixedly installed in the inner cavity at one end away from the extrusion frame. A connecting pipe is fixedly installed on the side of the elastic water bag for water supply away from the rigid expansion mechanism. The input end of the connecting pipe is connected to the elastic water bag for water supply, and the output end of the connecting pipe is connected to the flexible expansion mechanism.

5. The flexible and pressure-adjustable knee joint distraction device according to claim 4, characterized in that: The flexible expansion mechanism includes a connecting frame, which is fixedly installed on the end of the handle away from the rigid expansion mechanism. A receiving plate is fixedly installed on the outer end of the connecting frame. The top and bottom of the receiving plate are fixedly installed with expansion elastic water bags. The input end of the expansion elastic water bag is connected to the output end of the connecting pipe. A water pressure sensor is fixedly installed on the back of the connecting frame, and the detection end of the water pressure sensor is arranged inside the connecting pipe.

6. The flexible and pressure-adjustable knee joint distraction device according to claim 5, characterized in that: The rigid expansion mechanism includes a mounting frame, which is fixedly installed on the side of the handle away from the flexible expansion mechanism. A expansion component is fixedly installed on the outer end of the mounting frame, and a docking component is fixedly installed on the side of the expansion component close to the handle. The docking component is arranged on the inner side of the mounting frame and is connected to the outer end of the tension sensor.

7. The knee joint distraction device with flexible and adjustable pressure according to claim 6, characterized in that: The gear train is connected to the gear train by a gear rotation, and the gear train is connected to the gear train by a gear rotation, and the gear train is connected to the gear train by a gear rotation.

8. The knee joint distraction device with flexible and adjustable pressure according to claim 6, characterized in that: The docking assembly includes a side rail and a docking block, the side rail is fixedly installed on one end of the frame close to the handle, and telescopic springs are fixedly installed at both ends of the inner part of the side rail. The docking block is fixedly connected to one end of the tension sensor close to the rail frame, and a slot is provided on both sides of the docking block. The outer end of the telescopic spring is fixedly connected to a sliding block, and the sliding block is fixedly connected to a card block on the side close to the tension sensor. The card block is inserted into the interior of the card slot, and the overall top-down shape of the interior of the card slot is a right-angled trapezoid, and the top-down shape of the outer end of the card block is also an isosceles trapezoid, the inclined surface of the card block is set on the side close to the docking block, and the top of the sliding block is fixedly connected to a push plate.

9. The knee joint distraction device with flexible and adjustable pressure according to claim 1, characterized in that: The cam is fixedly mounted on a support frame, and the cam is secured to the support frame with an L-shaped slot and a second end of the first slide is secured to the support frame with an L-shaped slot.

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