CN115364441B

CN115364441B - A rehabilitation lower limb joint training device

Info

Publication number: CN115364441B
Application number: CN202211038625.8A
Authority: CN
Inventors: 刘斌; 韩文锋; 王丹妮; 王铮; 孙豪君; 王宁
Original assignee: General Hospital of Shenyang Military Region
Current assignee: General Hospital of Shenyang Military Region
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2025-12-02
Anticipated expiration: 2042-08-26
Also published as: CN115364441A

Abstract

The application relates to the technical field of medical instruments and discloses a lower limb joint training device for rehabilitation, which comprises a thigh support, a lower leg support and a pedal, wherein the thigh support comprises two first limiting plates, a supporting plate is fixed between the two first limiting plates, the lower leg support comprises two second limiting plates, a fixing box is fixed between the two second limiting plates, the two second limiting plates are respectively and rotatably connected with the two first limiting plates through a rotating shaft, the pedal is positioned on one side below the lower leg support, a binding belt for binding feet of a patient is arranged at the top of the pedal, the pedal is connected with the fixing box through a lifting mechanism, a connecting column can move along a lower cylindrical groove and an upper cylindrical groove, and a reset trend of the first spring occurs after the patient downwards forces the pedal under the action of the first spring and the fixing ring, so that a feedback force is exerted on the feet and the legs of the patient, and the leg of the patient achieves the effect of exercising.

Description

Lower limb joint training device for rehabilitation

Technical Field

The invention belongs to the field of medical equipment, and particularly relates to a lower limb joint training device for rehabilitation.

Background

Medical devices refer to instruments, devices, appliances, in vitro diagnostic reagents and calibrators, materials and other similar or related items for use directly or indirectly on the human body, including medical devices and medical consumables, the utility being obtained primarily by physical means, not by pharmacological, immunological or metabolic means, or by the assistance of these means.

In orthopaedics subjects in the medical field, certain patients can have critical damage to lower limbs due to accidents, fracture occurs when serious, the patients can recover gradually along with the time after receiving treatment, and corresponding medical instruments are also required to perform auxiliary exercise in the recovery process;

while the prior device still has the related technical problems when the lower limb joints of the patient are subjected to auxiliary rehabilitation exercise:

1. it is difficult to exercise the joints at the ankle of the patient;

2. In the recovery process, when the patient turns the lower limb joint inwards or outwards, the patient is difficult to receive a reverse feedback force, the inner side or the outer side of the lower limb joint cannot be well exercised, and in the turning process, the magnitude of the feedback force is difficult to control;

3. when the patient exercises the joints of the lower limbs, the device is difficult to massage the legs, so that the flow rate of blood of the legs of the patient cannot be accelerated, and the recovery effect is affected.

Disclosure of Invention

The technical problems to be solved are as follows:

Aiming at the defects of the prior art, the invention provides a lower limb joint training device for rehabilitation, which solves the problems in the background art.

The technical scheme is as follows:

in order to achieve the above purpose, the invention is realized by the following technical scheme:

A rehabilitation lower limb joint training device comprising:

the thigh support comprises two first limiting plates, and a supporting plate is fixed between the two first limiting plates;

The lower leg support comprises two second limiting plates, a fixing box is fixed between the two second limiting plates, and the two second limiting plates are respectively and rotatably connected with the two first limiting plates through rotating shafts;

the pedal is positioned at one side below the lower leg support, a binding belt for binding feet of a patient is arranged at the top of the pedal, and the pedal is connected with the fixed box through the lifting mechanism;

The connecting plate is located between the thigh support and the shank support, one end of the connecting plate is rotationally connected with the fixing box through the rotating shaft, and the other end of the connecting plate is connected with the first limiting plate through the reset mechanism.

In one possible implementation manner, the lifting mechanism comprises a lower cylindrical groove and an upper cylindrical groove, the lower cylindrical groove and the upper cylindrical groove are both arranged in the fixed box, the upper cylindrical groove is positioned at the top of the lower cylindrical groove, a connecting column is arranged between the lower cylindrical groove and the upper cylindrical groove, and the lower end of the connecting column extends to the lower part of the fixed box;

The connecting column is rotationally connected with the pedal through the rotating shaft, the outer portion of the connecting column is located in the upper cylindrical groove, a fixing ring is fixed to the connecting column, the diameter of the lower cylindrical groove is smaller than that of the upper cylindrical groove, the diameter of the fixing ring is consistent with the inner diameter of the upper cylindrical groove, the first spring can be limited by the aid of the lower cylindrical groove, and stability of the first spring is improved.

In one possible implementation, the shaft is a damping shaft, and the damping shaft is a damping shaft with adjustable damping.

In one possible implementation manner, the first spring is sleeved outside the connecting column and is arranged inside the lower column-shaped groove, the top of the first spring is contacted with the bottom of the fixing ring, and the first spring is matched with the fixing ring to have an upward resetting effect on the connecting column, so that after a patient steps on the pedal, the force fed back to the leg of the patient can be exerted, and the leg rehabilitation training is facilitated for the patient.

In one possible implementation manner, the top of the connecting column is connected with a plug rod, and a plurality of lateral buffer mechanisms are arranged outside the plug rod and positioned at the top of the fixed ring;

The side direction buffer gear includes snap ring, fixture block and spacing groove, the spacing groove is vertical to be seted up in the inside of fixed box, and the spacing groove is linked together with last cylindricality groove, the snap ring is located the inside of last cylindricality groove, the fixture block is fixed in the outside of snap ring, and the fixture block can slide from top to bottom along last cylindricality groove, the department is provided with the chuck in the middle of the inside of snap ring, the jack that matches with the inserted bar has been seted up to the department in the middle of the inside of chuck, the both sides of chuck all are fixed with the movable block, the inside both sides of snap ring all are fixed with the fixed block, two be fixed with the spacing ring between the fixed block, the spacing ring runs through the movable block, the movable block can be followed the spacing ring and slide, the outside of spacing ring is located the cover and is equipped with the third spring between movable block and the fixed block.

In one possible implementation, a stop ring is fixed to the inside of the snap ring above and below the chuck edge.

In one possible implementation manner, the middle part of the inserted link is in a rectangular structure, two sides of the inserted link are in arc structures, threads in the common spiral direction are arranged on two sides of the inserted link in the arc structures, a limit bolt is arranged in the upper column groove, a bolt rod of the limit bolt is in threaded connection with the inserted link, a disc is fixed at the bottom of the limit bolt rod, and the diameter of the disc is larger than that of the baffle ring.

In a possible implementation manner, the reset mechanism comprises two supporting plates, two supporting plates are respectively fixed on two sides of the bottom of the first limiting plate, a toothed plate is arranged at the top of each supporting plate, the toothed plate is in sliding connection with the supporting plates through sliding rails, the connecting plates are rotationally connected with the toothed plates through rotating shafts, fixing plates are respectively fixed at the bottom of each toothed plate and the bottom of one supporting plate, and a plurality of detachable second springs are arranged between the two fixing plates.

In one possible implementation manner, a plurality of rotating rollers are rotatably connected between the two first limiting plates through a rotating shaft, and a plurality of protruding blocks are integrally formed on the outer portions of the rotating rollers in an annular array.

In one possible implementation manner, a gear is mounted on one side of the rotating roller, the gear is in meshed connection with the toothed plate, the top of the first limiting plate is rotationally connected with an arc plate through a rotating shaft, the arc plate is located above the thigh support, and a sponge cushion is fixed on the inner wall of the arc plate.

The beneficial effects are that:

The connecting column can move along the lower column groove and the upper column groove, and under the action of the first spring and the fixing ring, after a patient downwards applies force to the pedal, the first spring has a reset trend, so that a feedback force is applied to the steps and the legs of the patient, and the legs of the patient achieve the effect of exercise;

By utilizing the damping rotating shaft, the patient can move the joint of the ankle by rotating the foot upwards or downwards so as to realize rehabilitation training on the ankle, and patients with different actual demands can be matched by adjusting the resistance of the damping rotating shaft.

Secondly, when the foot drives the pedal to turn inwards or outwards, the connecting column and the inserted link can synchronously rotate, and the inserted link is matched with the jack to drive the chuck to rotate, so that the moving block can rotate along the limiting ring, and the movement of the moving block can be hindered by utilizing the third spring, therefore, the foot of a patient needs to exert a force when the foot of the patient drives the pedal to turn inwards or outwards, and the leg of the patient is recovered to play a role in assisting in training in the horizontal direction.

Because a plurality of lateral buffer mechanisms can be additionally arranged, a user can select exercise force suitable for the user, the lateral buffer mechanisms can be limited through the limiting bolts, and the stability of the lateral buffer mechanisms is improved.

Thirdly, when the second limiting plate rotates around the first limiting plate, the connecting plate can drive the toothed plate to move along the supporting plate, and the toothed plate can be pulled by the second spring and the fixing plate, so that the leg of a patient is required to exert force in the moving process of the toothed plate, and the lower limb joint of the patient is exercised;

likewise, by varying the number of second springs, the device is made to meet the exercise requirements of different patients.

Fourth, through the cooperation of the rotating roller and the gear, when the patient exercises the legs, the second limiting plate rotates around the first limiting plate, and then when the toothed plate moves, the gear is driven to rotate so as to drive the rotating roller to rotate, and the rotating roller is matched with the convex blocks on the rotating roller, so that the patient can exercise the lower limbs and massage the legs of the patient, and the flow rate of the blood of the legs of the patient is accelerated;

The thigh of the patient can be fixed on the thigh bracket by matching with the arc-shaped plate and the foam-rubber cushion.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view showing the internal structure of the fixing case of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2;

FIG. 4 is a top view of the mounting box of the present invention;

FIG. 5 is a schematic view of the internal structure of the snap ring of the present invention;

FIG. 6 is a cross-sectional view of a snap ring of the present invention;

FIG. 7 is a side view of a first limiting plate of the present invention;

Fig. 8 is a side view of the toothed plate of the present invention.

Reference numeral 1, pedal; 2, connecting columns, 3, connecting plates, 4, a first limiting plate, 5, an arc plate, 6, a foam-rubber cushion, 7, a second limiting plate, 8, a fixed box, 9, a binding belt, 10, a limiting bolt, 11, a damping rotating shaft, 12, a clamping block, 13, a limiting groove, 14, a clamping ring, 15, a fixed ring, 16, a lower cylindrical groove, 17, a first spring, 18, a plunger rod, 19, an inserting hole, 20, a baffle ring, 21, a chuck, 22, a fixed block, 23, a limiting ring, 24, a third spring, 25, a moving block, 26, a rotating roller, 27, a lug, 28, a toothed plate, 29, a supporting plate, 30, a fixed plate, 31, a second spring, 32, an upper cylindrical groove, 33, a gear, 34 and a supporting plate.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise indicated, the meaning of "plurality" is two or more, and the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The technical scheme in the embodiment of the application aims to solve the problems, and the overall thought is as follows:

example 1:

As shown in fig. 1 and 3, the specific structure of this embodiment is a lower limb joint training device for rehabilitation, which includes:

the thigh support comprises two first limiting plates 4, and a supporting plate 34 is fixed between the two first limiting plates 4;

The lower leg support comprises two second limiting plates 7, a fixed box 8 is fixed between the two second limiting plates 7, and the two second limiting plates 7 are respectively and rotatably connected with the two first limiting plates 4 through rotating shafts;

The pedal 1, the pedal 1 locates at one side under the shank support, the top of the pedal 1 installs the bandage 9 used for binding patient's foot, and the pedal 1 is connected with fixed box 8 through the lifting gearing;

The connecting plate 3, connecting plate 3 are located between thigh support and the shank support, and the one end of connecting plate 3 is connected through the pivot rotation with fixed box 8, is connected through canceling release mechanical system between the other end of connecting plate 3 and the first limiting plate 4.

In some examples, the lifting mechanism comprises a lower cylindrical groove 16 and an upper cylindrical groove 32, the lower cylindrical groove 16 and the upper cylindrical groove 32 are both arranged in the fixed box 8, the upper cylindrical groove 32 is positioned at the top of the lower cylindrical groove 16, a connecting column 2 is arranged between the lower cylindrical groove 16 and the upper cylindrical groove 32, and the lower end of the connecting column 2 extends to the lower side of the fixed box 8;

The connecting column 2 is rotationally connected with the pedal 1 through the pivot, and the outside of connecting column 2 is located the inside of last cylindricality groove 32 and is fixed with solid fixed ring 15, and the diameter of lower cylindricality groove 16 is less than the diameter of last cylindricality groove 32, and gu fixed ring 15's diameter is consistent with the internal diameter of last cylindricality groove 32, utilizes down cylindricality groove 16 can carry out spacingly to first spring 17, improves first spring 17's stability.

In some examples, the shaft is a damped shaft 11, the damped shaft 11 employing a damped adjustable damped shaft.

In some examples, the inner part of the lower column groove 16 is located outside the connecting column 2 and sleeved with a first spring 17, the top of the first spring 17 is in contact with the bottom of the fixed ring 15, and the first spring 17 can have an upward reset effect on the connecting column 2 in cooperation with the fixed ring 15, so that after a patient steps on the pedal 1, the patient can play a feedback force on the leg of the patient, and the patient is helped to perform leg rehabilitation training.

By adopting the technical scheme:

the patient places the thighs on the top of the thigh support, places the calves on the shank support, and ties the feet on the top of the pedal 1 through the tie 9;

The connecting column 2 can move along the lower cylindrical groove 16 and the upper cylindrical groove 32, and under the action of the first spring 17 and the fixing ring 15, after a patient downwards applies force to the pedal 1, the first spring 17 has a reset trend, so that a feedback force is applied to the steps and the legs of the patient, and the legs of the patient achieve the exercise effect;

By means of the damping rotating shaft 11, the patient can rotate the foot upwards or downwards, the joint of the ankle can be moved, rehabilitation training can be achieved on the ankle, and patients with different actual requirements can be matched by adjusting the resistance of the damping rotating shaft 11.

Example 2:

In the specific structure of the embodiment, as shown in fig. 1-6, the top of the connecting column 2 is connected with an inserting rod 18, and a plurality of lateral buffer mechanisms are arranged outside the inserting rod 18 and positioned at the top of the fixed ring 15;

The side direction buffer gear includes snap ring 14, fixture block 12 and spacing groove 13, spacing groove 13 is vertical to be seted up in the inside of fixed box 8, and spacing groove 13 is linked together with last cylindricality groove 32, snap ring 14 is located the inside of going up cylindricality groove 32, fixture block 12 is fixed in the outside of snap ring 14, and fixture block 12 can slide from top to bottom along last cylindricality groove 32, department is provided with chuck 21 in the middle of the inside of snap ring 14, the jack 19 that matches with inserted bar 18 has been seted up in the middle of the inside of chuck 21, the both sides of chuck 21 all are fixed with movable block 25, the inside both sides of snap ring 14 all are fixed with fixed block 22, be fixed with spacing ring 23 between two fixed blocks 22, spacing ring 23 runs through movable block 25, movable block 25 can slide along spacing ring 23, the outside of spacing ring 23 is located the cover between movable block 25 and the fixed block 22 and is equipped with third spring 24.

In some examples, a stop ring 20 is secured to the inside of the snap ring 14 both above and below the edge of the chuck 21.

In some examples, the middle of the insert rod 18 is in a rectangular structure, two sides of the insert rod 18 are in arc structures, threads in the common spiral direction are arranged on two sides of the insert rod 18 in the arc structures, a limit bolt 10 is arranged in the upper cylindrical groove 32, a bolt rod of the limit bolt 10 is in threaded connection with the insert rod 18, a disc is fixed at the bottom of the bolt rod of the limit bolt 10, and the diameter of the disc is larger than that of the baffle ring 20.

By adopting the technical scheme:

The patient puts the foot on the pedal 1, when the foot drives the pedal 1 to turn inwards or outwards, the whole lower limb joint can rotate in the horizontal direction, and then the effect of exercise is achieved;

When the pedal 1 turns inwards or outwards, the connecting column 2 and the inserted link 18 synchronously rotate, the inserted link 18 is in a runway-shaped structure, the chuck 21 can be driven to rotate by being matched with the insertion hole 19, when the chuck 21 rotates, the moving block 25 can rotate along the limiting ring 23, the moving block 25 can be provided with a trend of obstructing the movement of the moving block 25 by using the third spring 24, and the clamping block 12 and the limiting groove 13 can enable the clamping ring 14 and the fixed box 8 to form a whole, so that the foot of a patient needs to exert a force when driving the pedal 1 to turn inwards or outwards, and the leg of the patient is recovered to play a role in assisting exercise in the horizontal direction.

Because a plurality of lateral buffer mechanisms can be additionally arranged, a user can select exercise force suitable for the user;

the lateral buffer mechanism can be limited through the limiting bolt 10, so that the stability of the lateral buffer mechanism is improved.

Example 3:

7-8, the reset mechanism comprises two supporting plates 29, the two supporting plates 29 are respectively fixed on two sides of the bottom of the first limiting plate 4, a toothed plate 28 is arranged at the top of each of the two supporting plates 29, the toothed plate 28 is slidably connected with the supporting plates 29 through sliding rails, the connecting plate 3 is rotatably connected with the toothed plate 28 through a rotating shaft, fixing plates 30 are respectively fixed at the bottom of the toothed plate 28 and the bottom of one of the supporting plates 29, and a plurality of detachable second springs 31 are arranged between the two fixing plates 30.

Through the technical scheme:

When the leg support is used, the leg support and the thigh support are connected through the rotating shaft, so that when the leg support rotates, the joints of the thighs and the shanks of a patient can be exercised;

When the second limiting plate 7 rotates around the first limiting plate 4, the connecting plate 3 drives the toothed plate 28 to move along the supporting plate 29, and the toothed plate 28 can be pulled by utilizing the second spring 31 and the fixed plate 30, so that the leg of a patient is required to exert force in the moving process of the toothed plate 28, and the lower limb joint of the patient is exercised;

Likewise, by varying the number of second springs 31, the device is made to meet the exercise requirements of different patients.

Example 4:

in the specific structure of this embodiment, as shown in fig. 7-8, a plurality of rotating rollers 26 are rotatably connected between the two first limiting plates 4 through a rotating shaft, and a plurality of protruding blocks 27 are integrally formed on the outer portion of the rotating rollers 26 in an annular array.

In some examples, a gear 33 is mounted on one side of the rotating roller 26, the gear 33 is in meshed connection with the toothed plate 28, the top of the first limiting plate 4 is rotatably connected with an arc plate 5 through a rotating shaft, the arc plate 5 is located above the thigh support, and a sponge cushion 6 is fixed on the inner wall of the arc plate 5.

Through the technical scheme:

When the leg massage device is used, the rotating roller 26 is matched with the gear 33, when a patient exercises the legs, the second limiting plate 7 rotates around the first limiting plate 4, and then the toothed plate 28 can drive the gear 33 to rotate when moving, and then the rotating roller 26 is driven to rotate, and the protruding blocks 27 on the rotating roller 26 are matched with the rotating roller, so that the legs of the patient can be massaged while the patient exercises the lower limbs, and the blood flow rate of the legs of the patient is accelerated;

The thigh of the patient can be fixed on the thigh bracket by matching the arc-shaped plate 5 and the foam cushion 6.

Finally, it should be noted that the above-mentioned examples are given for the purpose of illustration only and are not intended to limit the invention to the particular embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims

1. A rehabilitation lower limb joint training device, comprising:

The thigh support comprises two first limiting plates (4), and a supporting plate (34) is fixed between the two first limiting plates (4);

The lower leg support comprises two second limiting plates (7), a fixing box (8) is fixed between the two second limiting plates (7), and the two second limiting plates (7) are respectively connected with the two first limiting plates (4) in a rotating mode through rotating shafts;

The pedal (1) is positioned on one side below the lower leg support, a binding belt (9) for binding feet of a patient is arranged at the top of the pedal (1), and the pedal (1) is connected with the fixed box (8) through a lifting mechanism;

The connecting plate (3), the connecting plate (3) is located between thigh support and shank support, one end of the connecting plate (3) is connected with the fixed box (8) through the rotation of the rotating shaft, the other end of the connecting plate (3) is connected with the first limiting plate (4) through the reset mechanism;

The lifting mechanism comprises a lower cylindrical groove (16) and an upper cylindrical groove (32), wherein the lower cylindrical groove (16) and the upper cylindrical groove (32) are formed in the fixed box (8), the upper cylindrical groove (32) is positioned at the top of the lower cylindrical groove (16), a connecting column (2) is arranged between the lower cylindrical groove (16) and the upper cylindrical groove (32), the lower end of the connecting column (2) extends to the lower side of the fixed box (8), the connecting column (2) is rotationally connected with the pedal (1) through a rotating shaft, a fixing ring (15) is fixed in the upper cylindrical groove (32) outside the connecting column (2), the diameter of the lower cylindrical groove (16) is smaller than that of the upper cylindrical groove (32), and the diameter of the fixing ring (15) is consistent with the inner diameter of the upper cylindrical groove (32);

The top of the connecting column (2) is connected with an inserting rod (18), the outside of the inserting rod (18) is provided with a plurality of lateral buffer mechanisms at the top of the fixed ring (15), each lateral buffer mechanism comprises a clamping ring (14), a clamping block (12) and a limiting groove (13), each limiting groove (13) is vertically arranged in the fixed box (8), each limiting groove (13) is communicated with the corresponding upper cylindrical groove (32), each clamping ring (14) is positioned in the corresponding upper cylindrical groove (32), each clamping block (12) is fixed on the outside of the corresponding clamping ring (14), each clamping block (12) can slide up and down along the corresponding upper cylindrical groove (32), a chuck (21) is arranged in the middle of the inside of each clamping ring (14), a jack (19) matched with the corresponding inserting rod (18) is formed in the middle of each chuck (21), moving blocks (25) are fixed on two sides of each chuck (21), a fixed block (22) is fixed on two sides of the inside of each clamping ring (14), a limiting ring (23) is fixed between the two fixed blocks (22), each limiting ring (23) can slide up and down along the corresponding limiting blocks (25), a third spring (24) is sleeved between the movable block (25) and the fixed block (22) outside the limiting ring (23);

the clamping ring is characterized in that a baffle ring (20) is fixed above and below the inner part of the clamping ring (14) close to the edge of the chuck (21), the middle part of the inserted link (18) is of a rectangular structure, two sides of the inserted link (18) are of arc structures, threads in the common spiral direction are arranged on two sides of the arc structures of the inserted link (18), a limit bolt (10) is arranged in the upper cylindrical groove (32), a bolt rod of the limit bolt (10) is in threaded connection with the inserted link (18), a disc is fixed at the bottom of the bolt rod of the limit bolt (10), and the diameter of the disc is larger than that of the baffle ring (20).

2. A lower limb joint training device for rehabilitation according to claim 1, wherein the shaft is a damping shaft (11).

3. The lower limb joint training device for rehabilitation, as set forth in claim 1, characterized in that a first spring (17) is sleeved outside the connecting column (2) in the lower column groove (16), and the top of the first spring (17) is contacted with the bottom of the fixed ring (15).

4. The rehabilitation lower limb joint training device according to claim 1, wherein the reset mechanism comprises two supporting plates (29), the two supporting plates (29) are respectively fixed on two sides of the bottom of the first limiting plate (4), a toothed plate (28) is arranged at the top of each supporting plate (29), the toothed plate (28) is in sliding connection with the supporting plate (29) through a sliding rail, the connecting plate (3) is in rotary connection with the toothed plate (28) through a rotating shaft, a fixed plate (30) is fixed at the bottom of the toothed plate (28) and the bottom of one supporting plate (29), and a plurality of detachable second springs (31) are arranged between the two fixed plates (30).

5. The lower limb joint training device for rehabilitation, as set forth in claim 1, characterized in that a plurality of rotating rollers (26) are rotatably connected between the two first limiting plates (4) through a rotating shaft, and a plurality of protruding blocks (27) are integrally formed on the outer portion of the rotating rollers (26) in an annular array.

6. The lower limb joint training device for rehabilitation, as set forth in claim 5, characterized in that a gear (33) is installed on one side of the rotating roller (26), the gear (33) is engaged with the toothed plate (28), the top of the first limiting plate (4) is rotatably connected with an arc plate (5) through a rotating shaft, the arc plate (5) is located above the thigh support, and a foam-rubber cushion (6) is fixed on the inner wall of the arc plate (5).