CN112451310B - An orthopedic joint muscle strength exercise restorer - Google Patents

Abstract

The invention discloses an orthopedic joint muscle strength exercise restorer which comprises a base, wherein a frame body is fixed on the base, and the orthopedic joint muscle strength exercise restorer also comprises a seat surface, a leg driving frame, a moving seat, a foot treading part, a leg binding belt, a guide rail, a power mechanism and the like. The invention can be well matched with the lower limbs of patients, thereby well exercising the joint muscle force of the lower limbs of the patients. Specifically, the leg to be exercised can be always positioned between the driving rods through the two parallel thigh driving rods of the leg driving frame, the two parallel shank driving rods and the leg binding belt on the shank driving rods, so that the bending degree of the leg of the patient is always consistent with the bending angle of the driving rods in the exercising process; can drive the shank voluntarily through the motor rotation and take exercise, the messenger that simultaneously can be convenient through the outage of electromagnetism seat removes the seat and breaks away from power unit to make patient take exercise voluntarily through the going on of its shank.

Description

An orthopedic joint muscle strength exercise restorer

technical field

The invention belongs to the field of limb rehabilitation training equipment, in particular to an orthopedic joint muscle strength exercise restorer.

Background technique

The lower limb joint muscle strength exercise recovery device in the prior art is generally a passive exercise device, which is difficult to exert the active exercise ability of the patient's limbs, and often cannot make the patient take a moderate speed to exercise the lower limbs according to their own conditions. The active exercise and passive exercise are well combined, and the existing device is still difficult to ensure that the angle of the device and the angle of the lower limb are well matched when the lower limb joint muscle strength exercise is performed, which makes the exercise effect unsatisfactory, or the angle is too large. The joint is too stressed, or the angle is too small, and the degree of exercise is not enough.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art, and to provide an orthopaedic joint muscle strength exercise restorer, which can well realize the conversion of active exercise and passive exercise when a patient performs lower limb joint muscle strength exercise, and The device fits the patient's lower limbs well, so that the patient's lower limb joint muscle strength can be well exercised.

The technical scheme of the present invention is: an orthopedic joint muscle strength exercise restorer, comprising a base on which a frame body is fixed, and further comprising:

The seat surface is fixed on the right half of the frame body;

At least one leg drive frame, the leg drive frame includes two side-by-side thigh drive rods and two side-by-side calf drive rods, the right ends of each thigh drive rod are hinged with the seat surface, wherein the side by side are in the same position. The calf driving rod and the thigh driving rod on the side are movably connected by a transition rod;

The movable seat is hingedly connected with the left ends of the two lower leg driving rods;

The foot pedal is used for the foot to step on it when the leg joint muscle strength is exercised;

The number of leg restraint belts is 2, one of which is set between the two calf driving rods to fix the calf, and the other is set between the two thigh driving rods to fix the thigh;

The guide rail is located below the leg drive frame, and is connected with the movable seat along the longitudinal direction of the guide rail. When the movable seat moves back and forth along the guide rail, the leg fixed on the leg drive frame can be repeated around its knee joint. Do stretch and retract exercises;

The power mechanism includes a rack set along the longitudinal direction of the guide rail, the rack is meshed with the gear, the gear is connected with the output shaft of the motor, the motor and the moving seat are detachably connected through the connecting piece, and the motor and the motor control The electric motor is electrically connected to the power supply module; the detachable connection between the motor and the moving base includes an electromagnetic base and an iron body, the electromagnetic base is fixed on the left end of the moving base, and the iron body It is fixed on the right side wall of the motor, the electromagnetic seat is electrically connected with the power module through the power supply switch, and the electromagnetic seat can be attracted together with the iron body after being powered by the power supply switch, so that the motor Fixed connection with mobile base.

The number of the above-mentioned leg-moving racks is 2, which are respectively used for the joint muscle strength exercise of the left leg and the right leg.

The above-mentioned foot pedals include two fixed rods, the left ends of each fixed rod are respectively fixedly connected with the movable seat, a rotating shaft is arranged between the right ends of the two fixed rods, and a foot pedal is rotatably connected to the rotating shaft, and the pedal board is provided with a The foot is not easily separated from the collar of the foot board, and the surface of the foot board in contact with the sole of the foot is also provided with anti-skid patterns.

The right end of the above-mentioned moving seat is provided with a first pressure sensor, the motor is fixed on the left end of the moving seat, and the left side wall of the motor is provided with a second pressure sensor; the first pressure sensor and the second pressure sensor are respectively associated with the microprocessor signal The microprocessor is connected with the motor signal through the motor controller; the right end of the guide rail is provided with a right limit block, and the left end of the guide rail is provided with a left limit block; the rotation of the motor drives the gear to rotate, and the gear rotates along the rack Move, drive the moving seat to move along the guide rail, when the moving seat moves to the right to the right end of the guide rail, the first pressure sensor is in contact with the right limit block, and the first pressure sensor will detect the pressure The signal is sent to the microprocessor, and the microprocessor controls the reverse rotation of the motor through the motor controller, so that the motor drives the moving base to move leftward along the guide rail. When the moving base moves leftward to the left end of the guide rail When the second pressure sensor is in contact with the left limit block, the second pressure sensor sends a signal of detected pressure to the microprocessor, and the microprocessor controls the motor again through the motor controller Reverse the rotation, so that the motor drives the moving seat to move to the right again along the guide rail, and in this cycle, the microprocessor controls the moving seat to automatically move back and forth along the guide rail, so that the legs fixed on the leg driving frame can be moved around. The knee joint is repeatedly extended and retracted.

The left end of the above-mentioned guide rail is a horizontal guide rail, the middle part is inclined downward to the right, and the right end is a semi-circular arc-shaped guide rail, wherein the center of the semi-circular arc-shaped guide rail is located above the semi-circular arc-shaped guide rail.

The above-mentioned two transition rods are also connected with the knee covering cover through a plurality of springs, wherein the upper end of each spring is connected with the knee covering cover along the circumferential direction of the knee covering cover, and the lower end of each spring is connected to one of the transitions. The rods are detachably connected through the hooks fixed on the transition rods, and the knee wrapping cover is applied to the knees during the joint muscle strength exercise by disassembling the lower ends of several springs from the transition rods. pressure level.

The microprocessor is electrically connected with a start switch for making the entire orthopaedic joint muscle strength exercise restorer start to work; the microprocessor is also electrically connected with a pause switch.

The right end of the seat surface is also hinged with a seat back, and the seat back is connected with the frame body through a seat back lifting mechanism.

A support belt for supporting the popliteal fossa of the leg is also detachably connected between the two transition rods, and the support belt cooperates with the corresponding knee wrapping cover to make the legs as far as possible during repeated stretching and retracting exercises. Ensure that the flexion and extension angles of the large, calf and thigh driving rods and the calf driving rod are consistent, and make it difficult for the knee to separate from the transition rod between the thigh driving rod and the calf driving rod; A pelvic fixation structure that prevents the pelvis from moving during the stretching and retracting exercises, the pelvic fixing structure plays a role in fixing the pelvis during the repeated stretching and retracting of the legs, so as to avoid the loss caused by the movement of the pelvis during the exercise. Part of the leg exercising angle; the part of the lower leg driving rod located at the ankle is also provided with a loop for fixing the ankle part.

Beneficial effects of the present invention: The present invention provides an orthopaedic joint muscle strength exercise restorer, which can fit the patient's lower limbs well, so that the patient's lower limb joint muscle strength can be well exercised. Specifically, through the two side-by-side thigh driving rods and the two side-by-side calf driving rods and the leg restraint straps on the leg driving frame, the leg to be exercised can always be between the driving rods, so that the patient's legs During the exercise, the bending degree of the leg is consistent with the bending angle of the driving rod; the leg can be automatically driven to exercise through the rotation of the motor, and at the same time, the power of the electromagnetic seat can be easily disconnected from the power mechanism, so that the patient can Active exercise through its own legs. When the patient needs to exercise actively, when the movable seat moves to the left end of the track during passive exercise, the power supply to the electromagnetic seat is turned off through the power supply switch, so that there is no more suction between the electromagnetic seat and the iron body. The two are separated, so that the mobile seat is no longer connected to the electric power mechanism. At this time, the patient can freely stretch and bend the legs along the track, so as to realize the active exercise of the legs. The activity of the legs plays a strengthening role, and the active exercise function of the present invention can be easily separated and combined with the passive exercise function. When passive exercise is required again, during active exercise, when the movable seat moves to the left end of the track, At this time, the power supply to the electromagnetic seat is turned on by the power supply switch, so that the electromagnetic seat and the iron body are attracted together again, and the microprocessor is used to control the motor to rotate according to the set rule again, so that the movable seat can move along the track again. Repeated movements, thus again achieving passive exercise of the legs.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the structure of a foot pedal of the present invention;

3 is a schematic diagram of the connection structure between each thigh driving rod and the seat surface when the number of the leg driving frame of the present invention is 2;

4 is a schematic diagram of the connection structure of the mobile base and the power mechanism of the present invention;

FIG. 5 is a schematic diagram of the connection between the transition rod of the present invention and the knee wrapping cover through a plurality of springs.

Detailed ways

A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

1-5, the present embodiment provides an orthopaedic joint muscle strength exercise restorer, including a base 1 on which a frame body 2 is fixed, a seat surface 3, at least one leg drive frame , the moving seat 26, the foot pedal, the leg restraint belt 10, the guide rail 4 and the power mechanism, etc., the leg drive racks are generally arranged to be 2 side by side, respectively used to drive the left leg and the right leg to exercise (the accompanying drawings). Only one is drawn in 1). The seat surface 3 is fixed on the right half of the frame body 2; the leg driving frame includes two side-by-side thigh driving rods 6 and two side-by-side calf driving rods 5, and the right ends of each thigh driving rod 6 are connected to the The seat surface 3 is hinged, wherein the side-by-side lower leg driving rod 5 and the thigh driving rod 6 are connected movably by a transition rod 7; the movable seat 26 is hingedly connected with the left ends of the two calf driving rods 5; The foot stepping part is used for stepping on the leg joint muscle strength exercise; the number of leg restraint belts 10 is 2, one of which is set between the two calf driving rods 5 for fixing the calf, and the other It is arranged between two thigh driving rods 6 and is used to fix the thighs; the guide rail 4 is located below the leg driving frame, and is connected with the moving seat 26 longitudinally along the guide rail 4. When the moving seat 26 moves back and forth along the guide rail 4 When moving, the leg fixed on the leg drive frame can be repeatedly extended and retracted around its knee joint; the power mechanism includes a rack 27 arranged along the longitudinal direction of the guide rail 4, and the rack 27 It is meshed with the gear 17, the gear 17 is connected with the output shaft of the motor 19, the motor 19 is detachably connected with the moving base 26 through the connecting piece, the motor 19 is electrically connected with the motor controller and is electrically connected with the power module 16, the said The motor 19 is specifically a stepping motor. In the present invention, when the patient is exercising the muscle strength of the lower limb joints, when the leg is straightened, the movable seat 26 is located at the left end of the guide rail, and the angle between the calf driving rod 5 and the thigh driving rod 6 reaches 180 degrees at this time, At this time, the corresponding flexion angle of the knee joint is 0 degrees. When the movable seat 26 moves further to the left to the left end of the guide rail, the movable seat 26 is limited and can no longer move to the left. The flexion angle of the knee joint is -5 degrees. When the movable seat 26 is located at the rightmost end of the guide rail and is limited and cannot continue to move to the right, the calf is located below the seat surface 3, the lower surface of the thigh is close to the upper surface of the seat surface 3, and the thigh drives the rod 6 and The angle between the lower leg driving rods 5 is the smallest, which is basically 30 degrees, and the corresponding flexion angle of the knee joint at this time is 150 degrees. In this embodiment, the moving range of the movable seat 26 on the guide rail 4 can be set according to the angle range between the calf driving rod 5 and the thigh driving rod 6 actually required by the patient in different rehabilitation stages, so that the movement range of the movable seat 26 on the guide rail 4 can be limited. The flexion angle range of the knee joint. In addition, the speed of the moving seat moving back and forth on the guide rail 4 can be set according to the frequency of flexion and extension required for passive exercise, and the overall time of the moving seat repeated movement can be set according to the length of time required for the entire exercise process. .

Referring to FIG. 4 , the detachable connecting piece between the motor 19 and the moving base 26 includes an electromagnetic base 29 and a ferrous body 28 , the electromagnetic base 29 is fixed on the left end of the moving base 26 , and the ferrous body 28 is fixed on the right side wall of the motor 19, the electromagnetic seat 29 is electrically connected with the power supply module 16 through the power supply switch 23, and the electromagnetic seat 29 can be attracted to the ferrous body 28 after being powered by the power supply switch 23. Together, the motor 19 is fixedly connected with the moving base 26 . The present invention can automatically drive the legs to perform passive exercise through the rotation of the motor, and at the same time, the moving seat can be easily separated from the power mechanism through the power-off of the electromagnetic seat, so that the patient can independently perform active exercise through the legs. Specifically, when the patient needs to exercise actively, when the movable seat 26 moves to the leftmost end of the track 4 during the passive exercise, the power supply to the electromagnetic seat 29 is turned off through the power supply switch 23 at this time, so that the electromagnetic seat 29 and the iron There is no more suction between the bodies 28, so that the two are separated, so that the moving seat 26 is no longer connected to the electric power mechanism, and the patient can freely stretch and bend the legs along the track, so as to realize the active exercise of the legs, while moving. The seat is used as a counterweight at this time, and it also plays a strengthening role in the activities of the legs. The active exercise function of the present invention can be easily separated and combined with the passive exercise function. When the moving seat 26 moves to the leftmost end of the track 4, the power supply to the electromagnetic seat 29 is turned on through the power supply switch 23 at this time, so that the electromagnetic seat 29 and the iron body 28 are sucked together again, and the microprocessor 32 is used again. The motor 19 is controlled to rotate according to the set rule, so that the movable seat 26 moves repeatedly along the track again, so as to realize the passive exercise of the legs again.

Further, referring to FIG. 3 , the number of the leg-carrying frames is 2, which are respectively used for the joint muscle strength exercise of the left leg and the right leg. The microprocessor can be used for setting, so that the two legs can alternately realize the muscle strength exercise of the leg joints, or the two legs can be synchronized to realize the muscle strength exercise of the leg joints.

Further, referring to FIG. 2 , the foot pedal portion includes two fixed rods 12 , the left ends of each fixed rod 12 are respectively fixedly connected with the movable seat 26 , and a rotating shaft 15 is provided between the right ends of the two fixed rods 12 , and the rotating shaft 15 is arranged on the rotating shaft 15 . A foot board 14 is rotatably connected, and the foot board 14 is provided with a collar 13 to prevent the foot from being easily separated from the foot board 14 , and the surface of the foot board 14 in contact with the sole of the foot is also provided with anti-slip lines 25 . During the knee flexion exercise, the greater the knee flexion angle, the greater the ankle joint dorsiflexion angle, but many patients have insufficient ankle joint dorsiflexion, so this embodiment is to ensure the comfort of the ankle joint during the knee flexion process, so as to facilitate the knee joint to achieve effective Therefore, the rotating shaft 15 is arranged between the right ends of the two fixed rods 12, and the rotating shaft 15 is connected to the foot board 14 in rotation, so that the patient's foot can be rotated as the knee flexion angle increases, thereby avoiding knee flexion. Ankle discomfort defect during procedure.

Further, referring to FIG. 4 , the right end of the movable seat 26 is provided with a first pressure sensor 30, the motor 19 is fixed on the left end of the movable seat 26, and the left side wall of the motor 19 is provided with a second pressure sensor 31; A pressure sensor 30 and a second pressure sensor 31 are signal-connected to the microprocessor 32, and the microprocessor 32 is signal-connected to the motor 19 through the motor controller; the right end of the guide rail 4 is provided with a right limit block 24, and the guide rail The left end of 4 is provided with a left limit block 18; the rotation of the motor 19 drives the gear 17 to rotate, the gear 17 moves along the rack 27, and drives the movable seat 26 to move along the guide rail 4. When the movable seat 26 moves to the right At the right end of the guide rail 4, the first pressure sensor 30 is in contact with the right limit block 24, and the corresponding flexion angle of the knee joint is 150 degrees. At this time, the first pressure sensor 30 will detect a pressure signal Sent to the microprocessor 32, the microprocessor 32 controls the motor 19 to reverse through the motor controller, so that the motor 19 drives the moving seat 26 to move leftward along the guide rail 4, when the moving seat 26 moves to the left. When the left moves to the left end of the guide rail 4, the second pressure sensor 31 is in contact with the left limit block 17, and the flexion angle of the corresponding knee joint is -5 degrees. At this time, the second pressure sensor 31 will detect The pressure signal is sent to the microprocessor 32, and the microprocessor 32 controls the motor 19 to reverse again through the motor controller, so that the motor 19 drives the moving seat 26 to move to the right again along the guide rail 4, so cycle, the microprocessor 32 controls the moving seat 26 to automatically move back and forth along the guide rail 4, so that the legs fixed on the leg drive frame repeatedly perform stretching and retracting exercises around their knee joints. The positions of the left limit block 17 and the right limit block 24 on the guide rail 4 can be adjusted, so that the movement of the movable seat 26 on the guide rail 4 can be limited according to the flexion angle range of the knee joint actually required by the patient in different rehabilitation stages. range of movement.

Further, the left end of the guide rail 4 is a horizontal guide rail, wherein the left end of the horizontal guide rail is slightly tilted upward, to correspond to the knee joint hyperextension angle when the flexion angle of the knee joint during the muscle strength exercise of the leg is -5 degrees, The middle part of the guide rail 4 is inclined downward to the right, and the right end is a semi-circular arc guide rail, wherein the center of the semi-circular arc guide rail is located above the semi-circular arc guide rail, and the whole guide rail 4 is in line with the leg joint muscle strength exercise. The trajectory of the footsteps.

Further, referring to FIG. 5 , the two transition rods 7 are also connected to the knee covering cover 8 through a plurality of springs 9, and the inner surface of the knee covering cover is also provided with a silicone layer, which is very soft and can be In the process of leg exercising, the knee is protected; the upper end of each spring 9 is connected with the knee covering cover 8 along the circumferential direction of the knee covering cover 8, and the lower end of each spring 9 is connected to one of the transition rods 7. The hooks fixed on the transition rod 7 are detachably connected, and the lower ends of several springs 9 are disassembled from the transition rod 7 to realize the knee covering 8 pairs of knee parts during the joint muscle strength exercise. The amount of pressure applied can adjust the force applied to the knee in different rehabilitation stages of the patient, and improve the exercise intensity of the knee according to the gradual improvement of rehabilitation.

Further, the microprocessor 32 is electrically connected with the start switch 22 for making the entire orthopaedic joint muscle strength exercise restorer start to work, and the entire joint muscle strength exercise process can be started according to the program by turning on the start switch 22; The processor 32 is also electrically connected with the pause switch 11, which can stop exercising at any time.

Further, the right end of the seat surface 3 is also hinged with a seat back 20, and the seat back 20 is connected with the frame body 2 through the seat back lifting mechanism 21, and the inclination angle of the seat back can be adjusted, so as to realize that the patient can rest at different angles. For the purpose of exercising with the back of the chair, under the angle of the flat back of the chair, the patient can also be made to lie on his back to perform the muscle strength exercise of the leg joints.

Further, a support belt 34 for supporting the popliteal fossa of the leg can be detachably connected between the two transition rods 7, and the support belt 34 cooperates with the corresponding knee covering cover 8 so that the legs are repeatedly stretched and retracted. During the exercise, ensure that the flexion and extension angles of the large, calf and thigh driving rods 6 and calf driving rods 5 are consistent as much as possible, and make it difficult for the knee to separate from the transition rod 7 between the thigh driving rod 6 and the calf driving rod 5; the described The seat surface 3 is also provided with a pelvis fixing structure 33 that prevents the pelvis from moving during the repeated stretching and retracting of the legs. The function of the pelvis, so as to avoid the loss of part of the leg exercise angle caused by the movement of the pelvis during exercise; the part of the lower leg driving rod 5 located at the ankle is also provided with a collar 35 for fixing the ankle part.

To sum up, the present invention provides an orthopaedic joint muscle strength exercise restorer, which can fit the patient's lower limbs well, so that the patient's lower limb joint muscle strength can be well exercised. Specifically, through the two side-by-side thigh driving rods and the two side-by-side calf driving rods and the leg restraint straps on the leg driving frame, the leg to be exercised can always be between the driving rods, so that the patient's legs During the exercise, the bending degree of the leg is consistent with the bending angle of the driving rod; the leg can be automatically driven to exercise through the rotation of the motor, and at the same time, the power of the electromagnetic seat can be easily disconnected from the power mechanism, so that the patient can Active exercise through its own legs. When the patient needs to exercise actively, when the movable seat moves to the left end of the track during passive exercise, the power supply to the electromagnetic seat is turned off through the power supply switch, so that there is no more suction between the electromagnetic seat and the iron body. The two are separated, so that the mobile seat is no longer connected to the electric power mechanism. At this time, the patient can freely stretch and bend the legs along the track, so as to realize the active exercise of the legs. The activity of the legs plays a strengthening role, and the active exercise function of the present invention can be easily separated and combined with the passive exercise function. When passive exercise is required again, during active exercise, when the movable seat moves to the left end of the track, At this time, the power supply to the electromagnetic seat is turned on by the power supply switch, so that the electromagnetic seat and the iron body are attracted together again, and the microprocessor is used to control the motor to rotate according to the set rule again, so that the movable seat can move along the track again. Repeated movements, thus again achieving passive exercise of the legs.

The above disclosures are only a few specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims (5)

1. An orthopedic joint muscle strength exercise restorer, comprising a base (1) on which a frame body (2) is fixed, characterized in that it further comprises: The seat surface (3) is fixed on the right half of the frame body (2); At least one leg drive frame, the leg drive frame includes two side-by-side thigh drive rods (6) and two side-by-side calf drive rods (5), and the right end of each thigh drive rod (6) is connected to the seat The seat surface (3) is hinged, wherein the side-by-side lower leg driving rod (5) and thigh driving rod (6) on the same side are movably connected by a transition rod (7); the two transition rods (7) are also connected by A plurality of springs (9) are connected with the knee covering cover (8), wherein the upper end of each spring (9) is connected with the knee covering cover (8) along the circumferential direction of the knee covering cover (8). The lower end of (9) and one of the transition rods (7) are detachably connected by a hook fixed on the transition rod (7). By connecting the lower ends of several springs (9) to the transition rod (7) It is disassembled to realize the pressure exerted by the knee covering cover (8) on the knee during the joint muscle strength exercise; the two transition rods (7) can also be detachably connected with a support for the popliteal fossa of the leg. A support belt (34), the support belt (34) cooperates with the corresponding knee covering cover (8) to ensure that the large, calf and thigh drive rods (6) as far as possible during repeated stretching and retracting exercises of the legs The flexion and extension angles of the calf driving rod (5) are consistent, so that the knee is not easily separated from the transition rod (7) between the thigh driving rod (6) and the calf driving rod (5). The pelvis fixing structure (33) is also provided to prevent the pelvis from moving during the repeated stretching and retracting exercises of the legs, and the pelvic fixing structure (33) serves to fix the pelvis during the repeated stretching and retracting of the legs. The part of the lower leg driving rod (5) located at the ankle is also provided with a collar (35) for fixing the ankle part; The movable seat (26) is hingedly connected with the left ends of the two lower leg driving rods (5); The foot pedal is used for the foot to step on it when the leg joint muscle strength is exercised; Leg restraint straps (10), the quantity is 2, one of which is arranged between the two calf driving rods (5) for fixing the calf, and the other is arranged between the two thigh driving rods (6), used for fix the thigh; The guide rail (4) is located below the leg drive frame, and is connected with the moving seat (26) along the longitudinal direction of the guide rail (4). The left end of the guide rail (4) is a horizontal guide rail, the middle part is inclined downward to the right, and the right end It is a semi-circular arc-shaped guide rail, wherein the center of the semi-circular arc-shaped guide rail is located above the semi-circular arc-shaped guide rail; when the moving seat (26) moves back and forth along the guide rail (4), it can be fixed on the leg The legs on the walking frame are repeatedly extended and retracted around their knee joints; The power mechanism includes a rack (27) provided along the longitudinal direction of the guide rail (4), the rack (27) is meshed with a gear (17), and the gear (17) is connected with the output shaft of the motor (19) , the motor (19) is detachably connected to the moving base (26) through a connecting piece, the motor (19) is electrically connected to the motor controller and is electrically connected to the power module (16); the motor (19) is connected to the moving The connector for detachable connection between the seats (26) includes an electromagnetic seat (29) and a ferrous body (28), the electromagnetic seat (29) is fixed on the left end of the movable seat (26), and the ferrous body (28) ) is fixed on the right side wall of the motor (19), the electromagnetic seat (29) is electrically connected to the power supply module (16) through a power supply switch (23), and the electromagnetic seat (29) is connected to the power supply switch (23) After power supply, it can be attracted with the iron body (28), so that the motor (19) is fixedly connected with the moving base (26); The right end of the moving seat (26) is provided with a first pressure sensor (30), the motor (19) is fixed on the left end of the moving seat (26), and the left side wall of the motor (19) is provided with a second pressure sensor (31) ); the first pressure sensor (30) and the second pressure sensor (31) are signal-connected to the microprocessor (32) respectively, and the microprocessor (32) is signal-connected to the motor (19) through the motor controller; The right end of the guide rail (4) is provided with a right limit block (24), and the left end of the guide rail (4) is provided with a left limit block (18); the rotation of the motor (19) drives the gear (17) to rotate, and the gear ( 17) Move along the rack (27) to drive the moving seat (26) to move along the guide rail (4), when the moving seat (26) moves rightward to the right end of the guide rail (4), the first pressure The sensor (30) is in contact with the right limit block (24), the first pressure sensor (30) sends a signal of detected pressure to the microprocessor (32), and the microprocessor (32) passes the pressure The motor controller controls the motor (19) to reverse, so that the motor (19) drives the moving base (26) to move leftward along the guide rail (4), and when the moving base (26) moves leftward to the guide rail (4) ), the second pressure sensor (31) is in contact with the left limit block (18), and the second pressure sensor (31) sends a signal of detected pressure to the microprocessor (32) , the microprocessor (32) controls the motor (19) to reverse again through the motor controller, so that the motor (19) drives the moving seat (26) to move to the right again along the guide rail (4), and so on, The microprocessor (32) controls the moving seat (26) to automatically move back and forth along the guide rail (4), so that the leg fixed on the leg drive frame is repeatedly extended and retracted around its knee joint. 2 . An orthopedic joint muscle strength exercise restorer according to claim 1 , wherein the number of the leg drive racks is 2, which are respectively used for the joint muscle strength exercise of the left leg and the right leg. 3 . 3. An orthopaedic joint muscle strength exercise restorer according to claim 1, characterized in that, the pedal portion comprises two fixed rods (12), and the left ends of each fixed rod (12) are respectively connected with the movable seat (12). 26) Fixed connection, a rotating shaft (15) is arranged between the right ends of the two fixed rods (12), a foot pedal (14) is rotatably connected to the rotating shaft (15), and the foot pedal (14) is provided with a The collar (13) of the foot board (14) is not easily separated, and the surface of the foot board (14) in contact with the sole of the foot is further provided with anti-slip lines (25). 4. An orthopedic joint muscle strength exercise restorer according to claim 1, characterized in that, the microprocessor (32) is electrically connected with a start switch ( 22); the microprocessor (32) is also electrically connected with a pause switch (11). 5. An orthopaedic joint muscle strength exercise restorer according to claim 1, characterized in that a seat back (20) is hingedly connected to the right end of the seat surface (3), and the seat back (20) passes through The seat back lifting mechanism (21) is connected with the frame body (2).

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