A knee joint rehabilitation auxiliary device for orthopedics

Abstract

The application relates to the technical field of medical auxiliary devices, and discloses a knee joint rehabilitation auxiliary device for orthopedics, which comprises a rehabilitation chair supporting leg, a seat frame is arranged at the top of the rehabilitation chair supporting leg, a sponge pad is arranged at the top of the seat frame, a horizontal rod is arranged at the bottom of the seat frame, and a rehabilitation training mechanism is arranged at the outer edge of the horizontal rod. Through the arrangement of the passive telescopic cylinder and the active telescopic cylinder, the telescopic lead screw can drive the passive telescopic cylinder to be telescopically moved in the active telescopic cylinder, so that the small leg placing rack connected to the passive telescopic cylinder can be passively moved; the patient can move the small leg placing rack and the active telescopic cylinder by lifting the small leg, the active telescopic cylinder drives the one-way valve I and the one-way valve II to move, so that the patient can actively move, and the problems that the knee joint rehabilitation device has a single function, the patient can only adopt a passive movement mode in the initial stage to the final stage of rehabilitation, and cannot be switched to an active training mode according to the rehabilitation stage are solved.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, specifically to an orthopedic knee joint rehabilitation assistive device. Background Technology

[0002] The knee joint, composed of the lower end of the femur, the upper end of the tibia, and the patella, is the largest and most complex joint in the human body. It is a trochlear joint. As an important weight-bearing and mobility joint of the lower limb, the knee joint is prone to functional impairment due to trauma, surgery such as knee replacement, degeneration, etc. Postoperative or post-injury rehabilitation training is crucial for restoring the knee joint's flexion and extension ability, muscle strength, and limb coordination.

[0003] Existing knee joint rehabilitation equipment has limited functionality, allowing patients to use only passive exercise from the initial to the final stages of rehabilitation. It cannot switch to active training mode according to the patient's rehabilitation stage, making it difficult to meet the full-cycle needs from initial recovery to later strength enhancement. Therefore, it is necessary to invent a knee joint rehabilitation assistive device that combines dual training modes and can be flexibly switched to adapt to diverse clinical rehabilitation needs and improve rehabilitation efficiency and patient experience. Summary of the Invention

[0004] This invention provides an orthopedic knee joint rehabilitation assistive device that solves the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: an orthopedic knee joint rehabilitation assistive device, including a rehabilitation chair support leg, a seat frame installed on the top of the rehabilitation chair support leg, a sponge pad installed on the top of the seat frame, a crossbar installed on the bottom of the seat frame, and a rehabilitation training mechanism installed on the outer edge of the crossbar;

[0006] The rehabilitation training mechanism includes a position switching component, and a rehabilitation exercise component is installed at the bottom of the position switching component;

[0007] The position switching component includes a movable support, which is slidably connected to a crossbar.

[0008] The rehabilitation exercise component includes an outer cylinder, an active telescopic cylinder slidably connected to the inner wall of the outer cylinder, an exercise base fixedly mounted at the bottom of the active telescopic cylinder, the exercise base slidably connected to the outer cylinder, a one-way valve one and a one-way valve two provided at the top of the exercise base, a connecting groove opened at the top of the outer cylinder, an active external thread opened at the head of the active telescopic cylinder, an active connecting cylinder movably sleeved on the outer wall of the active telescopic cylinder, a switching external thread cylinder provided at the head of the active telescopic cylinder, a rotating disk installed on the outer wall of the switching external thread cylinder, a switching thread rod installed on the inner wall of the rotating disk, a thread rod connecting disk threadedly connected to the outer edge of the switching thread rod, and a connector installed on the outer wall of the thread rod connecting disk;

[0009] The inner wall of the moving outer cylinder is provided with a resistance groove, the moving base is slidably connected to the resistance groove, and the active telescopic cylinder is located between one-way valve one and one-way valve two.

[0010] The inner wall of the active telescopic cylinder is provided with a groove, and a limit strip is slidably connected to the inner wall of the groove. A passive telescopic cylinder is fixedly equipped on the outer wall of the limit strip. Both the moving base and the active telescopic cylinder are slidably connected to the limit strip.

[0011] The passive telescopic cylinder is equipped with a tail internal thread ring at the bottom, and a telescopic screw is threadedly connected to the inner wall of the tail internal thread ring. The passive telescopic cylinder is equipped with a head internal thread ring at the top, and the head internal thread ring is threadedly connected to the switching screw rod.

[0012] A cover plate is installed on the top of the moving outer cylinder, a fixed bracket is installed on the top of the cover plate, a locking disc is installed on the top of the fixed bracket, a locking rod is threaded to the inner wall of the locking disc, and a fixing hole is opened on the outer wall of the active telescopic cylinder.

[0013] As a preferred embodiment of the present invention, a large gear is fixedly sleeved on the outer wall of the telescopic lead screw, a small gear meshes with the outer edge of the large gear, a medium gear meshes with the outer edge of the small gear, and a drive gear meshes with the outer edge of the medium gear. The drive gear is fixedly sleeved on the power output shaft of the servo motor. The small gear, the medium gear, and the servo motor are all mounted on a protective shell. The protective shell is mounted on the moving outer cylinder and is movably connected to the movable bracket.

[0014] As a preferred embodiment of the present invention, the inner wall of the fixed bracket is provided with a sliding groove, and a slider is installed on the outer edge of the locking rod, the slider being slidably connected to the sliding groove.

[0015] As a preferred embodiment of the present invention, a moving block is movably connected to the inner wall of the connector, a calf support is installed on the outer wall of the moving block, a calf strap is installed on the inner wall of the calf support, and the calf support is movably connected to a movable bracket.

[0016] As a preferred embodiment of the present invention, the outer wall of the movable bracket is equipped with an installation bracket, the inner wall of the installation bracket is slidably connected with a pull rod, the outer wall of the pull rod is equipped with a pin, the outer edge of the pin is provided with a positioning rod, and the outer edge of the positioning rod is provided with a plurality of positioning grooves.

[0017] As a preferred embodiment of the present invention, connecting blocks are installed at both ends of the positioning rod, the connecting blocks are installed at the bottom of the seat frame, a plug is installed on the outer wall of the mounting bracket, a limiting rod is installed on the outer edge of the plug, the limiting rod is slidably connected to the pull rod, and a return spring is movably sleeved on the outer edge of the limiting rod.

[0018] The present invention has the following beneficial effects:

[0019] 1. This orthopedic knee joint rehabilitation assistive device, through the setting of passive and active telescopic cylinders, allows the telescopic screw to drive the passive telescopic cylinder to extend and retract within the active telescopic cylinder, enabling the lower leg support connected to the passive telescopic cylinder to undergo passive movement. The patient moves the lower leg, causing the lower leg support and the active telescopic cylinder to move. The movement of the active telescopic cylinder drives the movement of one-way valve one and one-way valve two, allowing the patient to perform active movement. This solves the problem of knee joint rehabilitation devices having limited functionality, where patients can only use passive movement from the early to the late stages of rehabilitation and cannot switch to active training mode according to the patient's rehabilitation stage.

[0020] 2. This orthopedic knee joint rehabilitation assistive device uses a rotating disc to drive a switching threaded rod to connect with the inner threaded ring of the head. At this time, the connector and the passive telescopic cylinder form an integral unit, allowing for passive training. When the switching threaded rod disengages from the inner threaded ring of the head, it connects with the switching outer threaded cylinder through the active connecting cylinder. At this time, the active telescopic cylinder and the connector form an integral unit, allowing for active training. This device has a simple switching structure, is easy to operate, and is small in size.

[0021] 3. This orthopedic knee joint rehabilitation assistive device, by pulling the pull rod, moves the pin, causing the pin to disengage from the positioning slot. At this time, the movable bracket can be moved, allowing the rehabilitation motion component to move from the right to the left, so that the rehabilitation motion component on this device can flexibly switch between the left and right legs. Attached Figure Description

[0022] Figure 1 This is a frontal perspective view of the present invention;

[0023] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the rehabilitation training mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the rehabilitation exercise component of the present invention;

[0026] Figure 5 This is a schematic cross-sectional view of the rehabilitation exercise component of the present invention;

[0027] Figure 6 This is a schematic diagram of the threaded rod position switching structure of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the diagram;

[0029] Figure 8 This is a schematic diagram of the location structure of the connecting groove in this invention;

[0030] Figure 9 This is a schematic diagram of the unfolded structure of the rehabilitation exercise component of the present invention;

[0031] Figure 10 This is a schematic diagram of the locking rod position structure of the present invention;

[0032] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B in the diagram;

[0033] Figure 12 This is a schematic diagram of the position switching component structure of the present invention.

[0034] In the picture: 1. Rehabilitation chair legs; 2. Seat frame; 3. Foam pad; 4. Crossbar; 5. Rehabilitation training device;

[0035] 51. Position switching component; 52. Rehabilitation exercise component;

[0036] 5101. Movable bracket; 5102. Mounting bracket; 5103. Pull rod; 5104. Plug; 5105. Limiting rod; 5106. Return spring; 5107. Pin; 5108. Positioning rod; 5109. Positioning groove; 5110. Connecting block;

[0037] 5201, Moving outer cylinder body; 52011, Resistance groove; 5202, Active telescopic cylinder; 5203, Moving base; 5204, One-way valve one; 5205, One-way valve two; 5206, Limiting bar; 5207, Groove; 5208, Passive telescopic cylinder; 5209, Active external thread; 5210, Active connecting cylinder; 5211, Switching external thread cylinder; 5212, Head internal thread ring; 5213, Switching threaded rod; 5214, Rotary disc; 5215, Threaded rod connecting disc; 5216, Connector; 5217. Moving block; 5218. Tail internal thread ring; 5219. Telescopic lead screw; 5220. Large gear; 5221. Small gear; 5222. Medium gear; 5223. Drive gear; 5224. Servo motor; 5225. Protective shell; 5226. Connecting groove; 5227. Cover plate; 5228. Fixed bracket; 5229. Slide groove; 5230. Locking disc; 5231. Locking rod; 5232. Sliding block; 5233. Fixing hole; 5234. Lower leg placement bracket; 5235. Lower leg strap. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-12 An orthopedic knee joint rehabilitation assistive device includes a rehabilitation chair support leg 1, a seat frame 2 installed on the top of the rehabilitation chair support leg 1, a sponge pad 3 installed on the top of the seat frame 2, a crossbar 4 installed at the bottom of the seat frame 2, and a rehabilitation training mechanism 5 installed on the outer edge of the crossbar 4.

[0040] In the above structure, the patient sits on the sponge pad 3, aligns the knee joint that needs rehabilitation with the rehabilitation training device 5, and then straps the lower leg to the rehabilitation training device 5. The rehabilitation training device 5 provides passive movement to the patient, and the patient can also use the rehabilitation training device 5 to perform voluntary movement.

[0041] The rehabilitation training device 5 includes a position switching component 51, and a rehabilitation exercise component 52 is installed at the bottom of the position switching component 51;

[0042] In the above structure, the position switching component 51 can switch the position of the rehabilitation exercise component 52, allowing it to move from the left to the right and vice versa, thus improving the flexibility of the device. The rehabilitation exercise component 52 can actively push the patient's lower leg to move, changing the angle between the lower leg and thigh from 90° to 170°. At the same time, the patient's lower leg can move on its own, changing the angle between the lower leg and thigh from 90° to 170°. At this time, the rehabilitation exercise component 52 plays a pulling role, providing resistance to the patient's movement and improving the strength of the patient's knee joint.

[0043] The position switching component 51 includes a movable support 5101, which is slidably connected to the crossbar 4;

[0044] In the above structure, the rehabilitation exercise component 52 is installed on the movable support 5101. When the movable support 5101 moves on the crossbar 4, it can drive the rehabilitation exercise component 52 to move. The crossbar 4 limits the movable support 5101, so that the movable support 5101 can only move horizontally on the crossbar 4, which improves the stability of the device.

[0045] The rehabilitation exercise component 52 includes an outer cylinder 5201, an active telescopic cylinder 5202 slidably connected to the inner wall of the outer cylinder 5201, an exercise base 5203 fixedly mounted at the bottom of the active telescopic cylinder 5202, the exercise base 5203 slidably connected to the outer cylinder 5201, a one-way valve 5204 and a one-way valve 5205 on the top of the exercise base 5203, a connecting groove 5226 on the top of the outer cylinder 5201, and a connecting groove 5226 on the head of the active telescopic cylinder 5202. The active external thread 5209 is provided. An active connecting cylinder 5210 is movably sleeved on the outer wall of the active telescopic cylinder 5202. A switching external thread cylinder 5211 is provided at the head of the active telescopic cylinder 5202. A rotating disk 5214 is installed on the outer wall of the switching external thread cylinder 5211. A switching thread rod 5213 is installed on the inner wall of the rotating disk 5214. A threaded rod connecting disk 5215 is threadedly connected to the outer edge of the switching thread rod 5213. A connector 5216 is installed on the outer wall of the threaded rod connecting disk 5215.

[0046] In the above structure, by setting the active connecting cylinder 5210, the active connecting cylinder 5210 is rotated, causing it to rotate on the active external thread 5209. Gradually, the active connecting cylinder 5210 comes into contact with the switching external thread cylinder 5211. At this time, the rotating disk 5214 is in contact with the connecting head 5216. When the rotating disk 5214 is in contact with the connecting head 5216, the switching thread rod 5213 is not in contact with the head internal thread ring 5212. When the active connecting cylinder 5210 comes into contact with the switching external thread cylinder 5211, the connecting head 5216, the thread rod connecting disk 5215, the switching thread rod 5213, the rotating disk 5214, the switching external thread cylinder 5211, and the active telescopic cylinder 5202 are connected as one unit. When the connecting head 5216 moves forward, it can drive the thread rod connecting disk 5215 and the switching external thread cylinder 5202. The threaded rod 5213, rotating disk 5214, switching external threaded cylinder 5211, and active telescopic cylinder 5202 move forward. When the active telescopic cylinder 5202 moves, it drives the moving base 5203, one-way valve 1 5204, and one-way valve 2 5205 to move. At this time, the gas in the moving outer cylinder 5201 is squeezed by one-way valve 1 5204. The squeezed gas enters the end of one-way valve 2 5205 through the connecting groove 5226, so that the compressed gas is discharged through one-way valve 2 5205. The discharged gas enters the bottom of the moving outer cylinder 5201. When the passive telescopic cylinder 5208 moves towards the servo motor 5224, the gas at the bottom of the moving outer cylinder 5201 will enter the top of the moving outer cylinder 5201 through one-way valve 1 5204, while one-way valve 2 5205 is in the closed state, so that the active telescopic cylinder 5202 has resistance when it moves.

[0047] The inner wall of the moving outer cylinder 5201 is provided with a resistance groove 52011, the moving base 5203 is slidably connected to the resistance groove 52011, and the active telescopic cylinder 5202 is located between the one-way valve 1 5204 and the one-way valve 2 5205.

[0048] In the above structure, the resistance groove 52011 can limit the movement base 5203, preventing the active telescopic cylinder 5202 from rotating in the outer cylinder 5201. When the telescopic screw 5219 rotates, the passive telescopic cylinder 5208 cannot rotate, allowing the passive telescopic cylinder 5208 to slide. When the telescopic screw 5219 rotates, it can drive the passive telescopic cylinder 5208 to slide in the active telescopic cylinder 5202, improving the rationality of the device.

[0049] The inner wall of the active telescopic cylinder 5202 is provided with a groove 5207. The inner wall of the groove 5207 is slidably connected to a limit strip 5206. The outer wall of the limit strip 5206 is fixedly equipped with a passive telescopic cylinder 5208. The motion base 5203 and the active telescopic cylinder 5202 are both slidably connected to the limit strip 5206.

[0050] In the above structure, through the setting of the groove 5207 and the limiting bar 5206, the limiting bar 5206 plays a limiting role, and the passive telescopic cylinder 5208 can only slide in the active telescopic cylinder 5202 and cannot rotate. Therefore, the passive telescopic cylinder 5208 can extend and retract.

[0051] The bottom of the passive telescopic cylinder 5208 is equipped with a tail internal thread ring 5218, and the inner wall of the tail internal thread ring 5218 is threadedly connected to the telescopic screw rod 5219. The top of the passive telescopic cylinder 5208 is equipped with a head internal thread ring 5212, and the head internal thread ring 5212 is threadedly connected to the switching screw rod 5213.

[0052] In the above structure, the rotation of the telescopic screw 5219 drives the tail internal thread ring 5218 and the passive telescopic cylinder 5208 to move. With the setting of the head internal thread ring 5212, when the patient needs to perform passive exercise, the rotating disk 5214 is rotated, which drives the switching screw rod 5213 to rotate, gradually connecting the switching screw rod 5213 with the head internal thread ring 5212. After the switching screw rod 5213 is connected to the head internal thread ring 5212, the extension and retraction of the passive telescopic cylinder 5208 drives the patient's lower leg to move.

[0053] The top of the moving outer cylinder 5201 is equipped with a cover plate 5227, the top of the cover plate 5227 is equipped with a fixed bracket 5228, the top of the fixed bracket 5228 is equipped with a locking disc 5230, the inner wall of the locking disc 5230 is threaded with a locking rod 5231, and the outer wall of the active telescopic cylinder 5202 is provided with a fixing hole 5233.

[0054] In the above structure, by rotating the locking disc 5230, the locking rod 5231 can be moved downward, so that the locking rod 5231 moves into the fixing hole 5233. At this time, the active telescopic cylinder 5202 can be locked. When the active telescopic cylinder 5202 is locked, the passive telescopic cylinder 5208 will not drive the active telescopic cylinder 5202 to move when it performs telescopic movement, thereby improving the service life of the active telescopic cylinder 5202.

[0055] In a preferred embodiment: a large gear 5220 is fixedly sleeved on the outer wall of the telescopic lead screw 5219, a small gear 5221 meshes with the outer edge of the large gear 5220, a medium gear 5222 meshes with the outer edge of the small gear 5221, a drive gear 5223 meshes with the outer edge of the medium gear 5222, and the drive gear 5223 is fixedly sleeved on the power output shaft of the servo motor 5224. The small gear 5221, the medium gear 5222, and the servo motor 5224 are all mounted on the protective shell 5225, which is mounted on the moving outer cylinder 5201 and is movably connected to the movable bracket 5101.

[0056] In the above structure, the servo motor 5224 drives the drive gear 5223, the middle gear 5222, the small gear 5221 and the large gear 5220 to rotate, so that the telescopic screw 5219 installed on the large gear 5220 can rotate. Therefore, the tail internal thread ring 5218, the passive telescopic cylinder 5208, the head internal thread ring 5212, the switching threaded rod 5213, the rotating disk 5214, the threaded rod connecting disk 5215 and the connecting head 5216 can extend and retract.

[0057] In a preferred embodiment: the inner wall of the fixed bracket 5228 is provided with a sliding groove 5229, and a slider 5232 is installed on the outer edge of the locking rod 5231, and the slider 5232 is slidably connected to the sliding groove 5229.

[0058] In the above structure, through the cooperation of slider 5232 and slide groove 5229, slider 5232 can only move up and down in slide groove 5229. When locking disc 5230 rotates, it can only drive locking rod 5231 to move up and down, so that locking rod 5231 is inserted into fixing hole 5233 and locking rod 5231 is disengaged from fixing hole 5233.

[0059] In a preferred embodiment: a moving block 5217 is movably connected to the inner wall of the connector 5216, a calf support 5234 is installed on the outer wall of the moving block 5217, a calf strap 5235 is installed on the inner wall of the calf support 5234, and the calf support 5234 is movably connected to the movable bracket 5101.

[0060] In the above structure, when the connector 5216 extends, it drives the lower leg placement frame 5234 to move on the movable support 5101. At this time, the angle between the lower leg placement frame 5234 and the movable support 5101 gradually increases, so the angle between the patient's lower leg and thigh gradually changes from 90° to 170°. When the patient's lower leg is placed on the lower leg placement frame 5234, the lower leg is bound by the lower leg strap 5235. When the lower leg exerts upward force, it can drive the lower leg placement frame 5234, the lower leg placement frame 5234, the moving block 5217 and the connector 5216 to move.

[0061] In a preferred embodiment: a mounting bracket 5102 is installed on the outer wall of the movable bracket 5101, a pull rod 5103 is slidably connected to the inner wall of the mounting bracket 5102, a pin 5107 is installed on the outer wall of the pull rod 5103, a positioning rod 5108 is provided on the outer edge of the pin 5107, and a plurality of positioning grooves 5109 are provided on the outer edge of the positioning rod 5108.

[0062] In the above structure, by setting a positioning groove 5109 on the positioning rod 5108, when the movable support 5101 needs to be moved, the pull rod 5103 is pulled, and the movement of the pull rod 5103 drives the pin 5107 to move, so that the pin 5107 can be disengaged from the positioning groove 5109. At this time, the movable support 5101 can be moved, so that the rehabilitation exercise component 52 can be moved from the right to the left, so that the device can switch between the left and right legs, improving the flexibility of the device.

[0063] In a preferred embodiment: connecting blocks 5110 are installed at both ends of the positioning rod 5108, the connecting blocks 5110 are installed at the bottom of the seat frame 2, a plug 5104 is installed on the outer wall of the mounting bracket 5102, a limit rod 5105 is installed on the outer edge of the plug 5104, the limit rod 5105 is slidably connected to the pull rod 5103, and a return spring 5106 is movably sleeved on the outer edge of the limit rod 5105.

[0064] In the above structure, the connecting block 5110 positions the positioning rod 5108. When it is necessary to fix the movable bracket 5101, the pull rod 5103 is unloaded. When the pull rod 5103 is pulled, the return spring 5106 is compressed. When the pull rod 5103 is not supported by force, the return spring 5106 is released. The elastic force of the return spring 5106 resets the pull rod 5103 and the pin 5107, so that the pin 5107 is inserted into the positioning groove 5109. At this time, the movable bracket 5101 cannot move, so that the movable bracket 5101 will not move when the patient does rehabilitation exercises, thus improving the stability of the device.

[0065] Working principle: During the initial rehabilitation training of patients, a passive training mode is adopted. The servo motor 5224 drives the drive gear 5223 to rotate. The rotation of the drive gear 5223 drives the middle gear 5222, the small gear 5221, and the large gear 5220 to rotate. When the large gear 5220 rotates, it drives the telescopic screw 5219 to rotate. The rotation of the telescopic screw 5219 drives the tail internal thread ring 5218 and the passive telescopic cylinder 5208 to move in the active telescopic cylinder 5202. At this time, the switching thread rod 5213 is connected to the head internal thread ring 5212 on the passive telescopic cylinder 5208. When the passive telescopic cylinder 5208 moves, it drives the switching thread rod 5213 and the connecting head 5216 to move, so that the lower leg support 52... 34. The lower leg strap 5235 moves on the movable support 5101, and the lower leg placement frame 5234 gradually changes from 90° to 170°, allowing the patient's knee joint to move. At this time, the locking rod 5231 is located in the fixing hole 5233 on the active telescopic cylinder 5202, so that the passive telescopic cylinder 5208 will not drive the active telescopic cylinder 5202 to move when it moves. During the patient's end-stage rehabilitation training, the active training mode is used. By turning the rotating disk 5214, the rotating disk 5214 drives the switching thread rod 5213 to rotate, gradually disengaging the switching thread rod 5213 from the inner thread ring 5212 of the head. At this time, by rotating the active connecting cylinder 5210, the active connecting cylinder 5210 and the active external thread 5209 are engaged. The system connects to the switching external threaded cylinder 5211, and then rotates the locking disc 5230. The rotation of the locking disc 5230 causes the locking rod 5231 to move upwards, disengaging it from the fixing hole 5233. At this time, the active telescopic cylinder 5202 can extend and retract within the moving outer cylinder body 5201. The patient's lower leg is positioned in the lower leg placement frame 5234 and secured by the lower leg strap 5235. Lifting the patient's lower leg causes the lower leg placement frame 5234 to move on the moving support 5101. This causes the lower leg placement frame 5234 to move the connector 5216, the switching threaded rod 5213, the rotating disc 5214, the switching external threaded cylinder 5211, the active connecting cylinder 5210, and the active telescopic cylinder 5202. The base 5203, one-way valve 1 5204, and one-way valve 2 5205 also move. At this time, the gas in the moving outer cylinder 5201 is compressed by one-way valve 1 5204. The compressed gas enters the side of one-way valve 2 5205 through the connecting groove 5226, causing the compressed gas to be discharged through one-way valve 2 5205. The discharged gas enters the cavity at the bottom of the moving outer cylinder 5201. When the passive telescopic cylinder 5208 moves towards the servo motor 5224, the gas at the bottom of the moving outer cylinder 5201 enters the top of the moving outer cylinder 5201 through one-way valve 1 5204, while one-way valve 2 5205 is in the closed state. This makes the active telescopic cylinder 5202 have resistance when it moves, allowing the patient to exercise with resistance during the final stage of training.When the rehabilitation exercise component 52 needs to be repositioned, pulling the lever 5103 moves the pin 5107, disengaging it from the positioning slot 5109. This allows the movable support 5101 to move, enabling the rehabilitation exercise component 52 to move from right to left. After the movement is complete, the lever 5103 is released, and the return spring 5106 resets the lever 5103 and pin 5107, allowing the pin 5107 to re-enter the positioning slot 5109. At this point, the movable support 5101 is fixed.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. An orthopedic knee joint rehabilitation assistive device, comprising a rehabilitation chair support leg (1), characterized in that: The top of the rehabilitation chair support leg (1) is equipped with a seat frame (2), the top of the seat frame (2) is equipped with a sponge pad (3), the bottom of the seat frame (2) is equipped with a crossbar (4), and the outer edge of the crossbar (4) is equipped with a rehabilitation training mechanism (5). The rehabilitation training mechanism (5) includes a position switching component (51), and a rehabilitation exercise component (52) is installed at the bottom of the position switching component (51). The position switching component (51) includes a movable bracket (5101), which is slidably connected to the crossbar (4); The rehabilitation exercise component (52) includes an outer cylinder (5201), an active telescopic cylinder (5202) slidably connected to the inner wall of the outer cylinder (5201), a motion base (5203) fixedly mounted on the bottom of the active telescopic cylinder (5202), the motion base (5203) slidably connected to the outer cylinder (5201), a one-way valve (5204) and a one-way valve (5205) provided on the top of the motion base (5203), a connecting groove (5226) opened on the top of the outer cylinder (5201), and the head of the active telescopic cylinder (5202)... The active external thread (5209) is provided in the part. The active telescopic cylinder (5202) is movably sleeved with an active connecting cylinder (5210) on its outer wall. The head of the active telescopic cylinder (5202) is provided with a switching external thread cylinder (5211). A rotating disk (5214) is installed on the outer wall of the switching external thread cylinder (5211). A switching thread rod (5213) is installed on the inner wall of the rotating disk (5214). A threaded rod connecting disk (5215) is threadedly connected to the outer edge of the switching thread rod (5213). A connector (5216) is installed on the outer wall of the threaded rod connecting disk (5215). The inner wall of the moving outer cylinder (5201) is provided with a resistance groove (52011), the moving base (5203) is slidably connected to the resistance groove (52011), and the active telescopic cylinder (5202) is located between one-way valve one (5204) and one-way valve two (5205). The inner wall of the active telescopic cylinder (5202) is provided with a groove (5207), and a limit strip (5206) is slidably connected to the inner wall of the groove (5207). A passive telescopic cylinder (5208) is fixedly equipped on the outer wall of the limit strip (5206). The motion base (5203) and the active telescopic cylinder (5202) are both slidably connected to the limit strip (5206). The passive telescopic cylinder (5208) is equipped with a tail internal thread ring (5218) at the bottom, and a telescopic screw (5219) is threadedly connected to the inner wall of the tail internal thread ring (5218). The passive telescopic cylinder (5208) is equipped with a head internal thread ring (5212) at the top, and the head internal thread ring (5212) is threadedly connected to the switching screw rod (5213). The top of the moving outer cylinder (5201) is equipped with a cover plate (5227), the top of the cover plate (5227) is equipped with a fixed bracket (5228), the top of the fixed bracket (5228) is equipped with a locking disc (5230), the inner wall of the locking disc (5230) is threaded with a locking rod (5231), and the outer wall of the active telescopic cylinder (5202) is provided with a fixing hole (5233).

2. The orthopedic knee joint rehabilitation assistive device according to claim 1, characterized in that: A large gear (5220) is fixedly sleeved on the outer wall of the telescopic lead screw (5219). A small gear (5221) meshes with the outer edge of the large gear (5220). A medium gear (5222) meshes with the outer edge of the small gear (5221). A drive gear (5223) meshes with the outer edge of the medium gear (5222). The drive gear (5223) is fixedly sleeved on the power output shaft of the servo motor (5224). The small gear (5221), the medium gear (5222), and the servo motor (5224) are all mounted on the protective shell (5225). The protective shell (5225) is mounted on the moving outer cylinder (5201). The protective shell (5225) is movably connected to the moving bracket (5101).

3. The orthopedic knee joint rehabilitation assistive device according to claim 1, characterized in that: The inner wall of the fixed bracket (5228) is provided with a sliding groove (5229), and a slider (5232) is installed on the outer edge of the locking rod (5231). The slider (5232) is slidably connected to the sliding groove (5229).

4. The orthopedic knee joint rehabilitation assistive device according to claim 1, characterized in that: The inner wall of the connector (5216) is movably connected to a moving block (5217), the outer wall of the moving block (5217) is equipped with a calf support frame (5234), the inner wall of the calf support frame (5234) is equipped with a calf strap (5235), and the calf support frame (5234) is movably connected to a movable support (5101).

5. The orthopedic knee joint rehabilitation assistive device according to claim 1, characterized in that: The outer wall of the movable bracket (5101) is equipped with a mounting bracket (5102), and the inner wall of the mounting bracket (5102) is slidably connected with a pull rod (5103). The outer wall of the pull rod (5103) is equipped with a pin (5107), and the outer edge of the pin (5107) is provided with a positioning rod (5108). The outer edge of the positioning rod (5108) is provided with a plurality of positioning grooves (5109).

6. The orthopedic knee joint rehabilitation assistive device according to claim 5, characterized in that: The positioning rod (5108) has connecting blocks (5110) installed at both ends. The connecting blocks (5110) are installed at the bottom of the seat frame (2). The outer wall of the mounting bracket (5102) is fitted with a plug (5104). The outer edge of the plug (5104) is fitted with a limiting rod (5105). The limiting rod (5105) is slidably connected to the pull rod (5103). The outer edge of the limiting rod (5105) is movably sleeved with a return spring (5106).

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