Flexible rehabilitation instrument for knee joint

Abstract

The invention discloses a flexible rehabilitation apparatus for knee joints, and particularly relates to the technical field of rehabilitation devices.The flexible rehabilitation apparatus comprises a supporting seat, a control table is fixedly connected to the front portion of the upper end of the supporting seat, and movement structures rotationally connected with driving structures are arranged at the left end and the right end of the control table; leg fixing structures are symmetrically arranged at the upper end of the moving structure front and back, and an auxiliary supporting structure slidably connected with the supporting seat is arranged on the rear portion of the inner surface of the moving structure. According to the flexible rehabilitation instrument for the knee joints, the required speed and angle are adjusted through the console, then the shanks of a patient are fixed in the movement structure through the leg fixing structure, the auxiliary supporting structure is pulled out to be supported on the bed surface, and after the movement structure and the auxiliary supporting structure are adjusted to the proper angle, the knee joints are fixed through the leg fixing structure. The driving structure drives the movement structure to operate, the legs of the patient are driven to move passively, quadriceps femoris muscles and tibialis anterior muscles of the patient are assisted in movement, and rehabilitation of the patient is helped.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation devices, and in particular to a flexible rehabilitation device for knee joints. Background Art

[0002] With the continuous development of modern medical technology, the rehabilitation treatment methods for knee joint diseases are becoming increasingly diversified. However, traditional knee joint rehabilitation equipment often lacks sufficient flexibility and is difficult to adapt to the personalized needs of different patients, resulting in poor rehabilitation effects.

[0003] Traditional rehabilitation training basically relies on human power or bicycle-type rehabilitation equipment to conduct rehabilitation training for patients. This training method is generally more intensive, and the patient is more painful during the use, and the training process is difficult to persist;

[0004] Moreover, it has a poor effect on the knee joint, and patients are prone to resist and struggle;

[0005] At the same time, it cannot be adjusted according to the leg length of different patients, and the scope of application is narrow. Therefore, patients with inappropriate sizes will feel uncomfortable during use, and this way of exercise is extremely unhealthy and it is difficult to achieve good rehabilitation effects. Summary of the invention

[0006] The main purpose of the present invention is to provide a flexible rehabilitation device for the knee joint, which can effectively solve the problems that the existing equipment is difficult to adjust in size and cannot meet the rehabilitation needs of different patients, and the exercise method is relatively rigid and the amount of exercise is large, which is not conducive to patient recovery.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A flexible rehabilitation device for a knee joint, comprising a support seat, a console fixedly connected to the front of the upper end of the support seat, a motion structure rotatably connected to a driving structure is arranged at the left and right ends of the console, a leg fixing structure is symmetrically arranged at the front and rear ends of the upper end of the motion structure, and an auxiliary support structure slidably connected to the support seat is arranged at the rear of the inner surface of the motion structure;

[0009] A limiting groove communicating with the rear end is provided at the rear portion of the inner surface of the support seat, and a sliding groove communicating with the inner cavity is provided at both right ends of the support seat.

[0010] Preferably, the driving structure includes a stepper motor controlled by a control console fixedly connected to the bottom wall of the inner cavity of the support seat, the output end of the stepper motor is fixedly connected to a threaded rod fixedly connected to the rear side wall of the inner surface of the support seat, the outer surface of the threaded rod is threadedly connected to a threaded block, the inner surface of the threaded block is rotatably connected to a round rod slidably connected to the inner surface of a slide groove on both sides, and the portion of the outer surface of the round rod located outside the support seat is rotatably connected to an L-shaped driving rod rotatably connected to the motion structure.

[0011] Preferably, the auxiliary support structure includes a slider slidingly connected to the inner surface of a limiting groove, a T-shaped slot matched with the inner limiting block of the limiting groove is provided in the middle of the lower end of the slider, a receiving groove II is symmetrically provided at the lower end of the slider, and support members are provided on the inner surfaces of the two receiving grooves II, the rear parts of the left and right ends of the slider are rotatably connected to support rod I, and the two support rods I are rotatably connected to a popliteal frame rotatably connected to the motion structure on one side away from the connection axis with the auxiliary support structure.

[0012] Preferably, the support member includes support rod 2 which is rotatably connected to the rear portion of the inner surface of storage slot 2, a storage slot 1 which is connected up and down is provided on the side of the support rod 2 away from storage slot 2, a support foot is rotatably connected to the side of the inner surface of storage slot 1 away from storage slot 2, a limiting rod 2 is fixedly connected to the side of storage slot 1 close to storage slot 2, and a limiting groove 2 is provided on the outer surface of the supporting foot and the rotating axis of support rod 2.

[0013] Preferably, the motion structure includes adjusting members symmetrically distributed and rotatably connected to the left and right sides of the popliteal fossa frame, the two adjusting members are fixedly connected to parallel rods on one side away from the popliteal fossa frame, the two parallel rods are commonly provided with a foot fixing member on one side away from the adjusting members, the upper ends of the parallel rods are rotatably connected to the leg fixing structure, the middle parts of the ends of the two parallel rods away from each other are rotatably connected to a swing rod rotatably connected to the outer surface of the adjacent support seat, the front parts of the ends of the two parallel rods away from each other are rotatably connected to the L-shaped driving rod on the same side, and the front parts of the ends of the two parallel rods away from each other are fixedly connected to a limiting column.

[0014] Preferably, the adjusting member includes a connecting rod rotatably connected to the popliteal fossa frame, the connecting rod is fixedly connected to an adjusting rod at one end away from the popliteal fossa frame, a button hole connected to the right end is linearly arranged at the left end of the adjusting rod, the inner surface of the adjusting rod is slidably connected to the outer surface of the parallel rod, and a cylindrical locking tongue slidably connected to the inner surface of the parallel rod is symmetrically arranged at the rear part of the outer surface of the parallel rod, the cylindrical locking tongue has the same diameter as the button hole, and a compression spring is fixedly connected to one of the ends of the two cylindrical locking tongues close to each other.

[0015] Preferably, the foot fixing member includes a limiting rod 1 fixedly connected to one end of the two parallel rods away from each other, the outer surfaces of the two limiting rods 1 are slidably connected to a limiting soft frame, and the ends of the two parallel rods close to each other are rotatably connected to a foot rest.

[0016] Preferably, the leg fixing structure includes upper parts symmetrically distributed on the left and right and rotatably connected to the upper ends of the parallel rods, lower parts are arranged on the inner surface of the upper parts, and Velcro is wrapped around the lower parts of the outer surfaces of the lower parts on both sides.

[0017] Preferably, the upper member comprises an arc block, the arc block is semi-arc-shaped, and a limit shaft rotatably connected to the parallel rod is fixedly connected at its lower end, and two slide grooves symmetrically connected to the lower member are provided on the inner surface of the arc block, and a locking member is provided on the inner surface of the arc block, and a plurality of rubber blocks are fixedly connected to the inner arc surface of the upper member in an annular distribution;

[0018] The lower part includes a lower supporting rod slidably connected to the inner surface of the arc block, and the front and rear ends of the lower supporting rod are fixedly connected to limiting rollers slidably connected to the inner surfaces of two adjacent slide grooves. A plurality of rubber blocks are fixedly connected to the inner arc surface of the lower supporting rod in an annular distribution, and the outer arc surfaces of the lower supporting rod on both sides are commonly connected to Velcro wrapping.

[0019] Preferably, the locking member includes a pull ring, a side of the pull ring close to the arc block is fixedly connected to a connecting rod, an end of the connecting rod away from the pull ring penetrates through the outer arc surface of the arc block, extends to the inner cavity of the arc block and is fixedly connected to an arc-shaped locking tongue slidably connected to the inner cavity of the arc block, an end of the arc-shaped locking tongue close to the pull ring is fixedly connected to a compression spring 2 fixedly connected to the inner cavity of the arc block, an end of the arc-shaped locking tongue away from the pull ring penetrates through the inner cavity of the arc block, extends to the inner surface of the second slide groove and is tightly attached to the upper end of the limiting roller, and the side of the arc-shaped locking tongue away from the limiting roller is arc-shaped.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adjusts the required speed and angle through the console, then fixes the patient's calf in the motion structure through the leg fixing structure, and pulls out the auxiliary support structure to support it on the bed surface. After adjusting the motion structure and the auxiliary support structure to a suitable angle, the motion structure is driven to operate through the driving structure, thereby driving the patient's leg to move passively, assisting the patient's quadriceps and tibialis anterior muscles to move, and helping the patient to recover.

[0022] 2. The present invention supports the equipment through the support auxiliary console set in the auxiliary support structure, and synchronously uses the support rod 1 and the popliteal fossa frame to support the patient's legs and popliteal fossa, thereby avoiding the patient's legs being suspended in the air and causing discomfort to the patient during rehabilitation training; through the mutual cooperation of the slider and the slide groove 1 and the adjustment of the motion structure, it can be suitable for patients with different leg lengths, thereby increasing the scope of use of the equipment.

[0023] 3. The present invention utilizes the cooperation of the parallel rod and the round rod, utilizes the action of the threaded block on the round rod to drive the L-shaped driving rod to move, and thereby drives the parallel rod to rotate around the swing rod through the action of the L-shaped driving rod, and through the action of the support rod 1, the adjusting part is moved upward horizontally, thereby driving the patient's legs to be lifted, so that the thigh and calf are arched at a certain angle, driving the patient's leg muscles to move, assisting in promoting muscle function recovery, preventing muscle atrophy, and increasing joint mobility.

[0024] 4. The present invention fixes the patient's legs during use through the cooperation of the upper part and the lower part, and uses the effect of Velcro to restrain the patient's legs in the motion structure. At the same time, the lower part is fixed to the lower side of the patient's legs through the cooperation of the lower part and the Velcro, thereby synchronously driving the patient's calves to move during the movement of the motion structure. A number of rubber blocks 1 and 2 for buffering are also provided therein to ensure the comfort of the patient's legs and avoid discomfort and struggle.

[0025] 5. The present invention uses advanced flexible materials and technologies to simulate the natural movement of the human knee joint and provide smooth and precise rehabilitation assistance. By precisely controlling the movement trajectory and force output during the rehabilitation process, it can better match the patient's needs, promote the rehabilitation of the knee joint, relieve the patient's pain, and improve the rehabilitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic cross-sectional view of the internal structure of the support base of the present invention;

[0028] Figure 3 It is a right view structural schematic diagram of the auxiliary support structure of the present invention;

[0029] Figure 4 It is a bottom view structural schematic diagram of the auxiliary support structure of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the support member of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the driving structure of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the adjusting member of the present invention;

[0033] Figure 8 It is a schematic structural diagram of a foot fixing member of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of the leg fixing structure of the present invention;

[0035] Fig.10 It is a schematic diagram of the structure and connection relationship of the upper component and the lower component of the present invention;

[0036] Fig.11 It is a schematic structural diagram of the locking member of the present invention.

[0037] In the figure: 1. console; 2. support seat; 21. slide slot 1; 22. limit slot 1; 3. drive structure; 31. stepper motor; 32. threaded block; 33. round rod; 34. L-shaped drive rod; 35. threaded rod; 4. motion structure; 41. adjustment member; 411. connecting rod; 412. adjustment rod; 413. buckle hole; 414. cylindrical lock tongue; 415. compression spring 1; 42. swing rod; 43. parallel rod; 44. foot fixing member; 441. limit rod 1; 442. foot support; 443. limit soft frame; 45. limit column; 5. leg fixing structure; 51. upper member; 511. arc block ; 512, slide groove two; 513, rubber block one; 514, locking piece; 5141, pull ring; 5142, connecting rod; 5143, arc-shaped lock tongue; 5144, compression spring two; 515, limit shaft; 52, lower part; 521, lower support rod; 522, limit roller; 523, rubber block two; 53, Velcro; 6, auxiliary support structure; 61, slider; 62, support rod one; 63, popliteal fossa frame; 64, support piece; 641, support rod two; 642, storage slot one; 643, limit rod two; 644, support foot; 645, limit slot two; 65, storage slot two; 66, T-shaped notch. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] Embodiment 1

[0040] like Figure 1 and Figure 2As shown, a flexible rehabilitation device for a knee joint comprises a support seat 2, a console 1 is fixedly connected to the front of the upper end of the support seat 2, a motion structure 4 rotatably connected to a driving structure 3 is arranged at the left and right ends of the console 1, a leg fixing structure 5 is symmetrically arranged at the front and rear ends of the upper end of the motion structure 4, and an auxiliary support structure 6 slidably connected to the support seat 2 is arranged at the rear of the inner surface of the motion structure 4;

[0041] A limiting groove 22 communicating with the rear end is provided at the rear portion of the inner surface of the support seat 2, and a sliding groove 21 communicating with the inner cavity thereof is provided at both left and right ends of the support seat 2.

[0042] It should be particularly noted that the above-mentioned console 1 is a conventional control device, which is used in the present invention to control the start and stop, rotation speed and rotation angle of the motor, so as to achieve different speeds, stay angles and frequency cycles according to different patients. Its control method and wiring method are conventional technical means in the prior art, and its specific internal structure and operating principle are not displayed and explained in the present invention.

[0043] The use of advanced flexible materials and technologies can simulate the natural movement of the human knee joint and provide smooth and precise rehabilitation assistance. It can also better match the patient's needs, promote the rehabilitation of the knee joint, reduce the patient's pain and improve the rehabilitation effect by precisely controlling the movement trajectory and force output during the rehabilitation process.

[0044] During the operation of this embodiment, the required speed and angle are first adjusted through the console 1, and then the patient's calf is fixed in the motion structure 4 through the leg fixing structure 5, and the auxiliary support structure 6 is pulled out to support it on the bed surface. After adjusting the motion structure 4 and the auxiliary support structure 6 to the appropriate angles, the motion structure 4 is driven by the driving structure 3 to operate, thereby driving the patient's legs to move passively, assisting the patient's quadriceps and tibialis anterior muscles to move, and helping the patient to recover.

[0045] Embodiment 2

[0046] Based on the first embodiment, the present embodiment uses the support member 64 provided in the auxiliary support structure 6 to assist the console 1 in supporting the device, and simultaneously uses the support rod 1 62 and the popliteal fossa frame 63 to support the patient's legs and popliteal fossa, so as to avoid the patient's legs being suspended in the air and causing discomfort to the patient during the rehabilitation training; through the mutual cooperation between the slider 61 and the slide groove 1 21 and the adjustment function of the motion structure 4, it can be suitable for patients with different leg lengths, thereby increasing the scope of use of the device.

[0047] Specifically, the auxiliary support base 2 supports the device and simultaneously provides support for the movement of the motion structure 4, see Figure 3 and Figure 4The auxiliary support structure 6 includes a slider 61 slidably connected to the inner surface of the limiting groove 22, a T-shaped notch 66 matched with the limiting block in the limiting groove 22 is opened in the middle of the lower end of the slider 61, and a receiving groove 2 65 is symmetrically opened at the lower end of the slider 61. The inner surfaces of the two receiving grooves 2 65 are both provided with support members 64. The rear parts of the left and right ends of the slider 61 are rotatably connected to support rods 1 62, and the two support rods 1 62 are rotatably connected to a popliteal frame 63 rotatably connected to the motion structure 4 on one side away from the connection axis with the auxiliary support structure 6.

[0048] The slider 61 can slide in the limiting groove 22, and can be pulled out to different lengths according to the different leg lengths of the patient, and the motion structure 4 can be adjusted to cooperate with the support rod 62 to make the motion structure 4 in a horizontal state;

[0049] The popliteal fossa frame 63 is used for placing the popliteal fossa, i.e. the connection between the thigh and the calf, of the patient to relieve the pressure of the patient.

[0050] Further, to achieve support for the slider 61, refer to Figure 4 and Figure 5 The support member 64 includes a support rod 641 rotatably connected to the rear part of the inner surface of the second storage groove 65, a storage groove 1 642 connected up and down is provided on the side of the support rod 641 away from the second storage groove 65, a support foot 644 is rotatably connected to the side of the inner surface of the first storage groove 642 away from the second storage groove 65, a limiting rod 643 is fixedly connected to the side of the first storage groove 642 close to the second storage groove 65, and a limiting groove 645 is provided on the outer surface of the rotation axis of the support foot 644 and the second support rod 641.

[0051] After the slider 61 is pulled out to the predetermined position, the support member 64 is first pulled out from the second storage slot 65, and then the support foot 644 is rotated until the second limiting slot 645 is in place. At this time, the support foot 644 is at a certain angle to the second limiting slot 645 and the support foot 644 is close to the bed surface to support the slider 61.

[0052] The second limiting rod 643 is used to limit the supporting foot 644 when the supporting foot 644 is folded up, so that it is inside the storage slot 1 642 and will not fall.

[0053] Embodiment 3

[0054] On the basis of the second embodiment, the present embodiment utilizes the cooperation between the parallel rod 43 and the round rod 33, utilizes the action of the threaded block 32 on the round rod 33 to drive the L-shaped driving rod 34 to move, and thereby drives the parallel rod 43 to rotate around the swing rod 42 through the action of the L-shaped driving rod 34, and through the action of the support rod 1 62, the adjusting member 41 is moved upward horizontally, thereby driving the patient's legs to be lifted, causing the thigh and calf to bend at a certain angle, driving the patient's leg muscles to move, and assisting in promoting muscle function recovery, preventing muscle atrophy, and increasing joint mobility.

[0055] Specifically, to realize the driving of the motion structure 4, as Figure 6 As shown, the driving structure 3 includes a stepper motor 31 fixedly connected to the bottom wall of the inner cavity of the support seat 2 and controlled by the control console 1, the output end of the stepper motor 31 is fixedly connected to a threaded rod 35 fixedly connected to the rear side wall of the inner surface of the support seat 2, the outer surface of the threaded rod 35 is threadedly connected to a threaded block 32, the inner surface of the threaded block 32 is rotatably connected to a round rod 33 slidably connected to the inner surface of the slide groove 21 on both sides, and the outer surface of the round rod 33 The portion located outside the support seat 2 is rotatably connected to an L-shaped driving rod 34 rotatably connected to the motion structure 4.

[0056] The L-shaped driving rod 34 can ensure that when the L-shaped driving rod 34 acts on the parallel rod 43, the limiting column 45 can prevent the movement of the parallel rod 43 and the L-shaped driving rod 34 from being stuck due to angle problems.

[0057] Specifically, to drive the patient's legs to perform passive movements, refer to Figure 2 , Figure 3 and Figure 4 The motion structure 4 includes adjusting members 41 symmetrically distributed and rotatably connected to the left and right sides of the popliteal fossa frame 63. The two adjusting members 41 are fixedly connected to a parallel rod 43 on one side away from the popliteal fossa frame 63. The two parallel rods 43 are commonly provided with a foot fixing member 44 on one side away from the adjusting member 41. The upper ends of the parallel rods 43 are rotatably connected to the leg fixing structure 5. The middle parts of the ends of the two parallel rods 43 away from each other are rotatably connected to a swing rod 42 rotatably connected to the outer surface of the adjacent support seat 2. The front parts of the ends of the two parallel rods 43 away from each other are rotatably connected to the L-shaped driving rod 34 on the same side. The front parts of the ends of the two parallel rods 43 away from each other are fixedly connected to a limiting column 45.

[0058] The parallel rod 43 is rotatably connected to the L-shaped driving rod 34. When the L-shaped driving rod 34 slides forward and backward in the slide groove 21, the parallel rod 43 is pushed to move backward through the limit column 45 and the connecting shaft with the parallel rod 43. At this time, due to the limit of the swing rod 42 and the support rod 62, the parallel rod 43 will keep moving backward in parallel and gradually drive the patient's lower leg to lift until it reaches a predetermined angle and maintains it, so that the patient can adapt to the muscle force degree of the angle.

[0059] Then slowly stretch your legs back to normalcy and repeat the rehabilitation training over and over again.

[0060] Further, to accommodate patients of different heights and leg lengths, see Figure 7The adjusting member 41 includes a connecting rod 411 rotatably connected to the popliteal fossa frame 63, an end of the connecting rod 411 away from the popliteal fossa frame 63 is fixedly connected to an adjusting rod 412, a left end of the adjusting rod 412 is linearly provided with a buckle hole 413 connected to the right end, the inner surface of the adjusting rod 412 is slidably connected to the outer surface of the parallel rod 43, and a cylindrical locking tongue 414 slidably connected to the inner surface of the parallel rod 43 is symmetrically arranged on the rear part of the outer surface of the parallel rod 43, the cylindrical locking tongue 414 has the same diameter as the buckle hole 413, and the ends of the two cylindrical locking tongues 414 close to each other are fixedly connected to a compression spring 415.

[0061] Since the leg lengths of different patients are different, the length of the part where the calf is placed needs to be adjusted. The cylindrical locking tongue 414 is pressed to make it enter the inside of the adjusting rod 412 and drive the parallel rod 43 to slide in the adjusting rod 412, so that it reaches different buckle holes 413 and gets stuck, thereby adjusting the distance between the parallel rod 43 and the popliteal fossa frame 63 to different lengths.

[0062] Further, to achieve fixation of the patient's foot, see Figure 8 The foot fixing member 44 includes a limiting rod 441 fixedly connected to one end of the two parallel rods 43 away from each other, the outer surfaces of the two limiting rods 441 are slidably connected to the limiting soft frame 443, and the ends of the two parallel rods 43 close to each other are rotatably connected to the foot support 442.

[0063] The patient's heel is placed on the foot support 442 and is clamped around the front and back of the sole of the foot by a limiting soft frame 443 , so that the patient's foot is fixed between the two parallel rods 43 .

[0064] Embodiment 4

[0065] On the basis of the third embodiment, the present embodiment fixes the patient's legs during use through the cooperation of the upper component 51 and the lower component 52, and uses the Velcro 53 to restrain the patient's legs in the motion structure 4. At the same time, the lower component 52 is fixed to the lower side of the patient's legs through the cooperation of the lower component 51 and the Velcro 53, so that the patient's calves can be synchronously driven to move during the movement of the motion structure 4. A number of rubber blocks 1 513 and rubber blocks 2 523 for buffering are also provided therein to ensure the comfort of the patient's legs and avoid discomfort and struggle.

[0066] Specifically, to achieve fixation of the patient's legs, refer to Fig. 9 The leg fixing structure 5 includes an upper member 51 symmetrically distributed on the left and right and rotatably connected to the upper end of the parallel rod 43, a lower member 52 is arranged on the inner surface of the upper member 51, and Velcro 53 is wrapped around the lower part of the outer surface of the lower members 52 on both sides.

[0067] The upper member 51 and the lower member 52 fix and support the upper and lower sides of the patient's legs respectively, and the two sliding lower members 52 are fixed by Velcro 53 .

[0068] Further, the patient's legs are limited from the upper side, see Fig.10 The upper member 51 includes an arc block 511, which is semi-arc-shaped and has a limit shaft 515 fixedly connected to the parallel rod 43 at its lower end. The inner surface of the arc block 511 is symmetrically provided with a slide groove 512 slidably connected to the lower member 52. A locking member 514 is provided on the inner surface of the arc block 511. A plurality of rubber blocks 513 are fixedly connected to the inner arc surface of the upper member 51 in an annular distribution.

[0069] The second slide groove 512 opened inside the upper member 51 provides a limiting track for the sliding of the lower member 52. The limiting shaft 515 synchronously arranged at the bottom end of the arc block 511 is rotatably connected to the upper part of the parallel rod 43. When not in use, the upper member 51 can be rotated to the upper side of the parallel rod 43. After the calf is placed, the arc block 511 is rotated by the limiting shaft 515 to make it perpendicular to the parallel rod 43, and the lower member 52 is pulled by the Velcro 53 on one side to make it slide out to the lower part of the patient's leg, and then the Velcro 53 is tightened.

[0070] Further, the patient's legs are restrained from below, see Fig.10 The lower component 52 includes a lower supporting rod 521 that is slidably connected to the inner surface of the arc block 511. The front and rear ends of the lower supporting rod 521 are fixedly connected with limiting rollers 522 that are slidably connected to the inner surface of the adjacent slide groove 512. A plurality of rubber blocks 523 are fixedly connected to the inner arc surface of the lower supporting rod 521 in an annular distribution. The outer arc surfaces of the lower supporting rods 521 on both sides are commonly wrapped and connected with the Velcro 53.

[0071] After the lower support rod 521 slides out, it can support the lower side of the patient's legs and carry the patient's calves to move along the movement trajectory of the parallel rod 43. The rubber block 1 513 and the rubber block 2 523 set on the inner arc surface of the lower support rod 521 and the inner arc surface of the arc block 511 provide buffering for the contact between the lower support rod 521 and the inner arc surface of the arc block 511 and the patient, thereby reducing the patient's discomfort.

[0072] Further, after the arc block 511 is in place, the arc block 511 is limited. Fig.11The locking piece 514 includes a pull ring 5141, and a connecting rod 5142 is fixedly connected to the side of the pull ring 5141 close to the arc block 511, and the end of the connecting rod 5142 away from the pull ring 5141 passes through the outer arc surface of the arc block 511 and extends to the inner cavity of the arc block 511 and is fixedly connected to an arc-shaped locking tongue 5143 that is slidably connected to the inner cavity of the arc block 511, and the end of the arc-shaped locking tongue 5143 close to the pull ring 5141 is fixedly connected to a compression spring 2 5144 that is fixedly connected to the inner cavity of the arc block 511, and the end of the arc-shaped locking tongue 5143 away from the pull ring 5141 passes through the inner cavity of the arc block 511 and extends to the inner surface of the second slide groove 512 and is tightly attached to the upper end of the limiting roller 522, and the side of the arc-shaped locking tongue 5143 away from the limiting roller 522 is arc-shaped.

[0073] The arc-shaped locking tongue 5143 is pushed out of the way and pressed against the upper side of the lower supporting rod 521 to limit the position of the lower supporting rod 521.

[0074] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flexible rehabilitation device for a knee joint, comprising a support seat (2), characterized in that: The front portion of the upper end of the support seat (2) is fixedly connected to a control console (1); the left and right ends of the control console (1) are provided with a motion structure (4) rotatably connected to the driving structure (3); the upper end of the motion structure (4) is symmetrically provided with a leg fixing structure (5); the inner surface rear portion of the motion structure (4) is provided with an auxiliary support structure (6) slidably connected to the support seat (2); The inner surface rear portion of the support seat (2) is provided with a limiting groove (22) communicating with the rear end, and both right ends of the support seat (2) are provided with a sliding groove (21) communicating with the inner cavity thereof.

2. A flexible rehabilitation device for knee joint according to claim 1, characterized in that: The driving structure (3) comprises a stepper motor (31) fixedly connected to the bottom wall of the inner cavity of the support seat (2) and controlled by the control console (1); the output end of the stepper motor (31) is fixedly connected to a threaded rod (35) fixedly connected to the rear side wall of the inner surface of the support seat (2); the outer surface of the threaded rod (35) is threadedly connected to a threaded block (32); the inner surface of the threaded block (32) is rotatably connected to a round rod (33) slidably connected to the inner surface of the two side slide grooves (21); the outer surface of the round rod (33) located outside the support seat (2) is rotatably connected to an L-shaped driving rod (34) rotatably connected to the motion structure (4).

3. A flexible rehabilitation device for knee joint according to claim 2, characterized in that: The auxiliary support structure (6) comprises a slider (61) slidably connected to the inner surface of the limiting groove (22); a T-shaped notch (66) adapted to the limiting block in the limiting groove (22) is provided in the middle of the lower end of the slider (61); a receiving groove (65) is symmetrically provided on the left and right lower ends of the slider (61); the inner surfaces of the two receiving grooves (65) are both provided with support members (64); the rear parts of the left and right ends of the slider (61) are both rotatably connected to support rods (62); the two support rods (62) are rotatably connected to a popliteal frame (63) rotatably connected to the motion structure (4) at one side away from the connecting axis of the auxiliary support structure (6).

4. A flexible rehabilitation device for knee joint according to claim 3, characterized in that: The support member (64) includes a second support rod (641) rotatably connected to the rear portion of the inner surface of the second storage groove (65); a first storage groove (642) connected up and down is provided on the side of the second support rod (641) away from the second storage groove (65); a support foot (644) is rotatably connected to the side of the inner surface of the first storage groove (642) away from the second storage groove (65); a second limiting rod (643) is fixedly connected to the side of the first storage groove (642) close to the second storage groove (65); and a second limiting groove (645) is provided on the outer surface of the rotation axis of the support foot (644) and the second support rod (641).

5. A flexible rehabilitation device for knee joint according to claim 4, characterized in that: The motion structure (4) comprises adjusting members (41) symmetrically distributed and rotatably connected to the left and right sides of the popliteal fossa frame (63); the two adjusting members (41) are fixedly connected to a parallel rod (43) on one side away from the popliteal fossa frame (63); the two parallel rods (43) are commonly provided with a foot fixing member (44) on one side away from the adjusting member (41); the upper ends of the parallel rods (43) are rotatably connected to the leg fixing structure (5); the middle parts of the ends of the two parallel rods (43) that are away from each other are rotatably connected to a swing rod (42) rotatably connected to the outer surface of the adjacent support seat (2); the front parts of the ends of the two parallel rods (43) that are away from each other are rotatably connected to the L-shaped driving rod (34) on the same side; and the front parts of the ends of the two parallel rods (43) that are away from each other are fixedly connected to a limiting column (45).

6. A flexible rehabilitation device for knee joint according to claim 5, characterized in that: The adjusting member (41) comprises a connecting rod (411) rotatably connected to the popliteal fossa frame (63); an end of the connecting rod (411) away from the popliteal fossa frame (63) is fixedly connected to an adjusting rod (412); a buckle hole (413) connected to the right end is linearly arranged at the left end of the adjusting rod (412); an inner surface of the adjusting rod (412) is slidably connected to an outer surface of the parallel rod (43); a cylindrical locking tongue (414) slidably connected to the inner surface of the parallel rod (43) is symmetrically arranged at the rear of the outer surface of the parallel rod (43); the cylindrical locking tongue (414) and the buckle hole (413) have the same diameter; and a compression spring (415) is fixedly connected to the ends of the two cylindrical locking tongues (414) close to each other.

7. The flexible rehabilitation device for knee joint according to claim 5, characterized in that: The foot fixing member (44) comprises a limiting rod (441) fixedly connected to one end of the two parallel rods (43) that is away from each other, the outer surfaces of the two limiting rods (441) are slidably connected to the limiting soft frame (443), and the ends of the two parallel rods (43) that are close to each other are rotatably connected to the foot support (442).

8. The flexible rehabilitation device for knee joint according to claim 5, characterized in that: The leg fixing structure (5) comprises an upper member (51) symmetrically distributed on the left and right and rotatably connected to the upper end of the parallel rod (43); a lower member (52) is arranged on the inner surface of the upper member (51); and Velcro (53) is commonly wrapped around the lower parts of the outer surfaces of the lower members (52) on both sides.

9. A flexible rehabilitation device for knee joint according to claim 8, characterized in that: The upper member (51) comprises an arc block (511), the arc block (511) is semi-arc-shaped, and a limit shaft (515) is fixedly connected to the lower end of the arc block (511) and is rotatably connected to the parallel rod (43). The inner surface of the arc block (511) is symmetrically provided with a second slide groove (512) slidably connected to the lower member (52). The inner surface of the arc block (511) is provided with a locking member (514). A plurality of rubber blocks (513) are fixedly connected to the inner arc surface of the upper member (51) in an annular manner. The lower member (52) comprises a lower supporting rod (521) slidably connected to the inner surface of the arc block (511); both front and rear ends of the lower supporting rod (521) are fixedly connected to limiting rollers (522) slidably connected to the inner surface of the adjacent second slide groove (512); a plurality of rubber blocks (523) are fixedly connected in an annular manner to the inner arc surface of the lower supporting rod (521); and the outer arc surfaces of the lower supporting rod (521) on both sides are connected to the Velcro (53) by winding around them.

10. A flexible rehabilitation device for knee joint according to claim 9, characterized in that: The locking member (514) comprises a pull ring (5141), a side of the pull ring (5141) close to the arc block (511) is fixedly connected to a connecting rod (5142), an end of the connecting rod (5142) away from the pull ring (5141) passes through the outer arc surface of the arc block (511) and extends to the inner cavity of the arc block (511) and is fixedly connected to an arc-shaped locking tongue (5143) slidably connected to the inner cavity of the arc block (511), and the arc-shaped locking tongue (5143) is fixedly connected to the inner cavity of the arc block (511). One end of the arc-shaped locking tongue (5143) close to the pull ring (5141) is fixedly connected to a second compression spring (5144) fixedly connected to the inner cavity of the arc block (511); one end of the arc-shaped locking tongue (5143) away from the pull ring (5141) passes through the inner cavity of the arc block (511) and extends to the inner surface of the second slide groove (512) and is tightly attached to the upper end of the limiting roller (522); and the side of the arc-shaped locking tongue (5143) away from the limiting roller (522) is arc-shaped.

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