201 results about "Leg strength" patented technology

The invention discloses a balance control method of a multi-leg robot, applied for balance control of the multi-leg robot during movement under the condition of non-structured terrain, wherein the control flow is simple and clear. The balance control method of the multi-leg robot comprises the following specific steps of: if finding out unstability of the robot, quickly calculating the landing positions of the tail ends of the legs in next movement period, and after executing a control policy, quickly switching the unstable state of the robot to a static stable state. A constraint condition that the landing positions of the ends of the legs should satisfy and the landing positions of the ends of the legs both are given by an analytic expression; the calculation efficiency is high; and the method is suitable for online real-time calculation and real-time control. The whole set of control method performs position control on the movement of each leg of the robot by means of the angle information of each joint of the robot, the gesture information of the body and the leg strength information at the ends of the legs; and the control method is suitable for balance control of the multi-leg robot in non-structured environment.

An acceleration sensor measures accelerations of the subject which act in directions of axes x, y, and z orthogonal to each other when the subject walks. A leg strength calculation unit calculates leg strength of the subject based on values of the accelerations measured by the acceleration sensor.

The invention discloses a double leg strength test experimental platform of a foot type walking robot. The experimental platform is composed of a robot double leg experimental platform frame, robot single leg assemblies, a robot double leg connector, a robot double leg experimental mechanism and a robot double leg controller. The two robot single leg assemblies are connected through the robot double leg connector, and the robot double leg experiment mechanism is connected with the robot double leg connector through a sliding block on a vertical guide rail. The robot double leg control system is used for collecting and processing data of the robot double leg experiment platform by setting communication of an upper computer and a lower computer and performing planning control over movement strategies. The double leg strength test experimental platform is suitable for controlling single leg strength and double leg strength of the foot type walking robot, walking tests on different terrain, load distribution and gait planning and suitable for early-stage study and control strategy verification of researchers of the foot type walking robot and has the advantages of being low in cost, easy to manufacture and accurate and reliable in experimental result.

Disclosed is a rehabilitation walking-aid assistive device. The rehabilitation walking-aid assistive device comprises an exoskeleton frame, an elastic energy storage device, a clutch and a sensor, wherein the exoskeleton frame is worn on the shanks and legs of a wearer, one end of the elastic energy storage device is fixed to the exoskeleton frame, and in a walking process, energy can be stored and released to reduce muscle strength requirements and lower walking energy consumption, the clutch is fixed to the exoskeleton frame and one end of the clutch is connected with the other end of the elastic energy storage device; the sensor is connected with the other end of the clutch, and is used for sensing information of pressure exerted by the sole and controlling the clutch based on the information of the pressure. The sensor transmits a sensed signal to the clutch, and the clutch controls an energy storing and releasing opportunity of the elastic energy storage device based on the received signal, so that the elastic energy storage device is matched with gaits of the wearer. The rehabilitation walking-aid assistive device can lower the maximal muscle strength requirement and energy consumption in the walking process of the wearer, old people with the weaker strength can walk longer, and the rehabilitation walking-aid assistive device can also assist other injury patients with the weak strength in legs in conducting rehabilitation walking training.

The invention discloses a multifunctional massage medical rehabilitation chair, which comprises a seat plate, an elastic cushion is fixed in the middle of the top surface of the seat plate; Between the front support plates, the end of the middle rotating shaft is hinged on the corresponding front support plate, and one end of the middle rotating shaft protrudes from the front support plate and is connected with the output shaft of the front drive motor through a coupling; it can Tilt the support frame to meet the needs of different users. At the same time, the massage roller body can rotate automatically to improve the comfort of use. There is no need to manually move up and down to push the massage roller body to roll. At the same time, it can meet the needs of different legs. For rehabilitation users, when the strength of the user's legs is insufficient, the front drive motor can be run to realize the assistance to lift the leg mobile frame, so as to realize the rehabilitation use, and at the same time, the leg rolling body has the effect of massaging the legs. It has many functions and good effect.

The invention discloses a massage medical rehabilitation chair with legs automatically running, which comprises a seat board, the middle part of the top surface of the seat board has a mounting groove, a lifting plate is inserted into the mounting groove, and a seat cushion is fixed on the top surface of the lifting plate The bottom surface of the lifting plate is fixed with a plurality of guide rods, the guide rods protrude from the main socket on the bottom surface of the installation groove, the middle part of the bottom surface of the seat plate is fixed with a lifting motor, and the output shaft of the lifting motor is vertically inserted into the installation groove. The middle through hole of the groove is screwed into the lifting screw sleeve, the top of the lifting screw sleeve is fixed on the bottom surface of the lifting plate, the lifting screw sleeve is inserted into the middle through hole of the installation groove, and the bottom front and rear sides of the seat plate Both are fixed with outriggers; the rear end of the seat board is fixed with an inclined backrest; it can meet the needs of different leg rehabilitation users, and when the user's legs are not strong enough, it can be driven by the front drive motor to realize Assists in raising the leg mobile frame for rehabilitation use.

The invention relates to a multi-purpose sit-up board. The multi-purpose sit-up board comprises a front foot stand and a rear foot stand, wherein the front foot stand is formed by fixing a front cross bar and a front upright post, the rear foot stand is formed by fixing a rear cross bar and a rear upright post, the front cross bar and the rear cross bar are connected in a horizontal insertion manner and can be subjected to expansion and contraction adjustment, the insertion position is locked through a fastener, a seat cushion is horizontally fixedly connected above the rear cross bar, a backrest is arranged at the rear side of the seat cushion, the bottom of the backrest is adjacent to the rear side of the seat cushion and is hinged to the rear foot stand, an adjustment part for adjusting the angle between the backrest and the seat cushion is arranged between the backrest and the rear foot stand, lower knee supports are arranged at the front side of the seat cushion, lower foot supports are arranged at the front lower sides of the lower knee supports, a leg strength training mechanism and a boxing handle are further arranged on the front foot stand, and tension ropes are arranged on the front foot stand and the rear foot stand. The multi-purpose sit-up board is simple in structure and rich in exercising functions, and the angle of the backrest can be adjusted conveniently.

The invention provides a leg strength rehabilitation training device which comprises a top plate, a carrier plate, a spring, a lower suspension, a first gear, a second gear, a connecting plate and a pedal. The top plate is fixed to the front end face of the carrier plate, and the rear end of the spring is mounted on the front end face of the top plate. By means of the design, the knee joint and the ankle joint of a patient can be exercised at the recovery preliminary stage of the patient, the first gear is mounted on the lower suspension through a rotary shaft, the second gear is mounted on the left side of the connecting plate, and gear teeth of the first gear and gear teeth of the second gear are engaged. The connecting plate is arranged on the lower side of the first gear, the connecting plate is mounted on the lower suspension through a rotary shaft, and the pedal is mounted on the right side of the connecting plate through a rotary shaft. By means of the design, the patient can obtain leg training of proper strength at the recovery middle and later periods of the patient, the riding stability of the patient is improved, and the leg strength rehabilitation training device is convenient to use and operate, capable of meeting training needs of the patient at different recovery stages and high in reliability.

A leg strength measuring apparatus is capable of measuring a gravity center distribution of loads and leg strength which can in turn serve as a reference for the selection of a ski, a snowboard, ski boots, or snowboarding boots appropriate for a user of the apparatus. The leg strength measuring apparatus includes two footplates upon which a person to be measured steps separately with his left and right feet, and load sensors for detecting loads applied to each of the footplates at least at three points.

The invention relates to a seat leg trainer with which can synchronously train two legs backwards and forwards. The invention mainly comprises a chair, left and right pedals, and transmitters connected with the pedals, two groups of tracks, and an angle adjuster, an adjustable damping device fixed on the bottom support, a synchronous steering device, a position adjuster, a tension device, and a data collecting displaying processing system. The invention has adjustable angle between two legs, to synchronously train two legs, and realize one-leg periodical alternation and one-way load method. The invention provides training platform to linearly adjust the train load, to meet different heights and knee angles, while it can collect, store, and real-time display the parameters in the train.

This compact flexible stand-up fish fighting harness set (Harness Set) embodies various adjustable straps, belts and other connections which are either directly attached to a rigid fishing rod gimbal receiver with flexible upper leg supports, or to the fishing reel lugs. Harness Set unites angler and fishing rod and reel rig (Rig) when they are under pulling stress of fighting a large game fish (Fish). Harness Set frees angler's arms, hands and lower back from pulling on fishing rod while drawing on angler's greater legs strength of quadriceps muscles and body weight to leverage said fishing rod. Harness Set differs from other harness and gimbal receiver designs in several significant features. Contoured and cushioned leg supports conform to angler's thighs, but are sufficiently flexible to enable an angler to walk sideways (to follow Fish) while maintaining great pressure against Fish. Leg supports are angularly adjustable on the gimbal receiver base to comfortably match angler's stature and stance. A cushioned rump-to-reel strap transfers leg leverage and body weight to Rig, as angler drops into semi-sitting position and then reels against game fish as angler returns to standing upright; while always maintaining steady pulling pressure against Fish. Harness Set also benefits from groin straps and suspenders strap(s), and an accessory fishing rod butt extension.

Provided is an electronic acceleration pedal arrangement having a treading force adjusting function of making treading force feeling of a driver different when the pedal is compressed or released to reduce fatigue feeling of driver by frequent acceleration operation to improve operability, in the electronic acceleration pedal arrangement for electrically detecting degree of turning by the treading force applied to the pedal and determining acceleration degree based on this. The electronic acceleration pedal arrangement comprises a pedal arm disposed turnably in the cabin, a detection sensor for detecting degree of turning at the turning time of the pedal arm, a treading force adjusting means disposed in the pedal arm and for changing the treading force depending on the turning direction of the pedal arm, and a contact member contacting with the treading force adjusting means at the turning time of the pedal arm.

The invention discloses multifunctional outdoor sports fitness equipment. The multifunctional outdoor sports fitness equipment comprises a support, a top plate, a base and a seat, wherein a sliding rail is arranged on the side wall of the base, and a sliding part is arranged on the base; the middle of the support is fixedly connected with a lug, and the lug is hinged with a connecting plate; the upper surface of the support is fixedly connected with a mounting plate, the mounting plate is fixedly connected with a spring, the other end of the spring is fixedly connected with the lower surface of a connecting rod, the right side of the top plate is fixedly connected with a first pulley, a frame is arranged at the bottom of the first pulley, and a pull ring is arranged at the bottom of the frame; a third pulley is arranged on the support, a second pulley is arranged at the top of the support, a rotating wheel is connected with the base in a rolling way by virtue of a rotating shaft, the two sides of the rotating wheel are fixedly connected with a pedal respectively; and a fourth pulley is fixedly connected below the third pulley on the support. The multifunctional outdoor sports fitness equipment can train arm power and leg strength of a human body, and the fitness equipment can adjust the distance between the seat and the support and height of the seat, so that the multifunctional outdoor sports fitness equipment is applicable to different reminded crowds.

The invention relates to an exercising chair, and particularly relates to an abdomen exercising chair. The abdomen exercising chair can exercise the abdomen, exercise the legs and massage the abdomen.The abdomen exercising chair comprises a base frame, a sitting plate, a sit-up mechanism and a leg lifting exercising mechanism, wherein the two sides of the base frame are connected with supportingframes; the other side of the base frame is connected with the sitting plate; the sit-up mechanism is installed on one side of the sitting plate; and the leg lifting exercising mechanism is installedon the other side of the sitting plate. A user can swing upwards through waist strength through the sit-up mechanism, and therefore the abdomen exercising effect can be achieved; the user can lift upwards through leg strength through the leg lifting exercising mechanism, and therefore the leg exercising effect can be achieved; and the abdomen can be massaged through an abdomen relaxing mechanism,so that the muscle of the abdomen is relaxed, and then the effects of exercising the abdomen, exercising the legs and massaging the abdomen are achieved.

The invention relates to a method for finding out mattress with proper hardness and pillow with proper height by comparing muscle strength. The method is characterized by comprising the following steps of: (1) laying a testee on the bed and selecting a mattress and a pillow with the proper hardness; (2) testing the leg strength of the testee, changing mattress with different hardness and selecting the mattress with the hardness at the maximum leg strength value; and (3) testing the arm strength of the testee, changing pillows with different heights and selecting the pillow with the height at the maximum arm strength value. The invention has the advantage that the mattress and pillow suitable for the testee can be scientifically selected to fit the antisternum curvature of every person so that people can have a more comfortable sleep with healthy antisternum.

The invention mainly relates to the field of fitness devices, and discloses a comprehensive limb strength exercise device. The device comprises a bottom frame, two leg strength exercise devices, and an upper-limb strength exercise device, wherein each leg strength exercise device comprises a pedal and a plurality of tension springs; the upper-limb strength exercise device comprises an A-shaped support, a device box, and two-arm pressing rods; weight placement boxes are arranged in the device box; weight blocks are arranged in the weight placement boxes; stay cords are connected onto the weightplacement boxes; and the other end of each stay cord penetrates the top end of the device box and is connected with the top end of the corresponding two-arm pressing rod. The device provided by the invention has the beneficial effects of low cost and small occupied space, and is a fitness device for simultaneous muscle fitness training of the limbs.

The invention discloses a wearable standing-up and sitting-up assistance device which comprises a shelled battery and a rear cover. The shelled battery and the rear cover are connected through a bolt. A belt is mounted in front of the shelled battery, and wire passing holes and a power switch are arranged on the lower portion of the shelled battery. Wires stretch out of the wire passing holes. The lower portions of the wires are connected with shelled servo motors. Touch switches are mounted on the upper portions of the shelled servo motors, and the inner sides of the shelled servo motors are connected with thigh supporting frames through bolts. Thigh fixing belts are mounted on the upper portions of the thigh supporting frames, and the inner sides of the thigh supporting frames are connected with electromagnetic clutches through bolts. The electromagnetic clutches are connected with shank supporting frames through bolts. Shank fixing belts are mounted on the lower portions of the shank supporting frames. The wearable standing-up and sitting-up assistance device assists a user with injured knees or leg strength degradation in easily completing conversion of the sitting posture and the standing posture, and the shelled battery on the waist and the belt are matched so that the user can be supported according to the waist curve.

The invention provides a somatosensory motion simulation system. The simulation system comprises a user gravity center movement data acquisition unit, a standard movement model generation unit, a processing unit, a safety protection unit and a teaching unit. According to the simulation system provided by the invention, the gravity center movement data of a user can be collected in real time, whether the movement of the user is standard or not is analyzed according to the gravity center movement data of the user, when great deviation exists between the movement of the user and the standard movement, prompt is given out or the on-going movement is controlled, so that the movement behavior of the user is corrected and improved, further, the user masters the essential of the movement rapidly,therefore, the safety of the movement is guaranteed, in addition, the system has the functions of timely protection, movement body sensing and motion load generation and management, thus the user canbe helped to overcome the psychological disorder, the waist, back and leg strength is increased, and the training comprehensive effect is promoted.

The invention relates to the technical field of limb auxiliary adjustment, and particularly relates to a limb auxiliary adjusting device for obstetrical nursing. The limb auxiliary adjusting device for obstetrical nursing aims at solving the technical problems that the rehabilitation effect is not achieved, the flexibility is not high, and the comfort is poor. In order to solve the technical problems, the limb auxiliary adjusting device for obstetrical nursing comprises a sliding frame, wherein a distance adjusting device is fixedly connected to the sliding frame in a sleeving mode; a liftingdevice is fixedly connected to the middle of the top face of the distance adjusting device; and the opposite sides of the distance adjusting device and the lifting device are fixedly connected throughtwo springs. By repeatedly changing the length of a second hydraulic rod and utilizing the lever principle between a bending rod and a bending part, two supporting legs of a puerpera are driven to alternately ascend and reciprocate, blood circulation of the lower limbs can be achieved, blood circulation is promoted, venous return of the lower limbs of a patient is achieved to dredge blood vessels, leg strength recovery training of the puerpera is facilitated, and the situation that the puerpera lies on a sickbed for a long time, and consequently the body is stiff and difficult to recover is avoided.

The invention discloses a leg strength training device for track and field athletes. The leg strength training device comprises a base and a damping seat and is characterized in that a rotary wheel is arranged on a support, pedals are arranged on the front and rear sides of the rotary wheel, a water tank is arranged on the right of the upper side of a support plate, a rotary shaft is arranged in the water tank, the outer end of the rotary shaft extends out of the water tank and is provided with a driven wheel, the driven wheel is connected with the rotary wheel through a belt, the rotary shaft is further provided with fan blades located in the water tank, an exhaust pipe is arranged at the upper end of the water tank, the damping seat comprises a support seat, a groove is formed in the upper side of the support seat, a clamp groove is formed in the periphery of the groove, an elastic steel plate is mounted on the upper portion of the groove through the clamp groove, a U-shaped cushion is arranged between the lower side of the elastic steel plate and the groove and provided with a plurality of cavities, damping springs are arranged in the cavities, a rubber pad is arranged in a gap between the elastic steel plate and the U-shaped cushion, and damping pads are arranged at the left and right ends of the rubber pad. The leg strength training device is simple in structure, convenient to use, high in comfortableness, low in cost and convenient to maintain.

The invention relates to the technical field of leg training devices, and discloses a leg training device for athletes in track and field, the leg training device comprises an equipment body, and support legs are fixedly mounted on the left and right sides of the bottom of the equipment body. According to the leg training device for athletes in track and field, a tightening bolt is arranged on thelimiting seat; when the weight of the counterweight box needs to be adjusted; firstly, the tightening bolt is screwed off and the rotating rod is rotated in the opposite direction, and the cover plate can be opened, the counterweight blocks in the counterweight box are increased or decreased; by adjusting the weight of the counterweight, the cover plate is covered and the tightening bolt is locked; an athlete only needs to sit on the cushion, the two feet step on the pedal plates, the pedal plates are pedaled forcefully, the movable sleeve rods drive the pedal plates and the whole counterweight box to slide up and down in the direction of the connecting rods, high-strength training can be conducted on the leg strength of an athlete, the leg strength of the athlete can be effectively trained, and the practicability of the leg strength training device is greatly improved.

The invention relates to a seat leg trainer with which legs can be separated to train. The invention mainly comprises a chair, left and right pedals, and transmitters connected with the pedals, two groups of tracks, and an angle adjuster, an adjustable damping device fixed on the bottom support, a synchronous steering device, a position adjuster, a tension device, and a data collecting displaying processing system. The invention has adjustable angle between two legs, to synchronously train two legs, and realize one-leg periodical alternation and one-way load method. The invention provides training platform to linearly adjust the train load, to meet different heights and knee angles, while it can collect, store, and real-time display the parameters in the train.

The invention relates to a multifunctional labor-saving walking stick which is formed by a walking stick pillar and a pedal. The walking stick pillar is formed by sleeving both upper and lower sections of metal pipes; the height of the walking stick pillar can be regulated by a locking device; a bidirectional grab handle is arranged at the top end of the walking stick; a user can alternately use the bidirectional grab handle with both left and right hands; the pedal is made of engineering plastic or aluminium alloy; two movable supporting feet are respectively arranged inside both edges at the bottom of the pedal; a stable three-foot supporting pedal can be formed by the movable supporting feet and the walking stick pillar; when the walking stick is used as a ladder climbing pedal, half the leg strength can be saved; when the pedal is risen, the pedal can be used as a rest stool; and when the movable supporting feet are stored and the pedal is turned to the position in parallel to the walking stick pillar, the multifunctional labor-saving walking stick can be used as a common walking stick. The multifunctional labor-saving walking stick has simple structure, is light to use and is convenient to manufacture.

The invention discloses a kicking trainer and belongs to a body-building apparatus. The exerciser consists of a base (1), a chair (2), a kicking transverse rod (3) and a movable connecting rod (4), wherein the bottom of a chair (2) backbone has a cushion pad, while the back end of the backbone is hinged with a back bracket of the base (1) and the front end is hinged with the middle part of the movable connecting rod (4); and the upper end of the movable connecting rod (4) is hinged with the middle part of the kicking transverse rod (3), while the lower end is hinged with the base (1). An exerciser can achieve exercise effect by kicking legs to overcome body weight and lift the kicking transverse rod (3). Moreover, the kicking trainer has simple structure and can train leg strength.

The invention relates to the technical field of physical training instruments. The invention discloses a leg training device for track and field sports. The device comprises a training board, a stretching groove is formed in the top of the training board, two stretching plates are connected into the stretching groove in a sliding manner, an extension spring is fixedly connected between the two stretching plates, the top of the stretching plate on the left side is fixedly connected with a connecting block, a push training plate is fixedly connected to the top of the connecting block, an adjusting groove is formed in the training plate and located in the bottom wall of the stretching groove, a convex block is slidably connected to the interior of the adjusting groove, a threaded rod is in threaded connection with the interior of the convex block, a rotating block is fixedly connected to the right end of the threaded rod, and a cushion is fixedly connected to the top of the training plate. According to the leg training device for track and field sports, training to realize different leg strengths of athletes with different heights is effectively facilitated, the training performance of the training device is enriched, and the adaptability and practicability of the training device are improved.

The invention relates to the field of sports devices and provides a freestyle swimming land training device. The training device comprises a rack, wherein an upper limb training mechanism, a support mechanism for body pronation and a lower limb training mechanism are successively arranged on the rack; the upper limb training mechanism and the lower limb training mechanism are respectively positioned at two sides of the support mechanism; the upper limb training mechanism is provided with two sets of stretching assemblies which are used for exercising arm strength and are corresponding to human body arms; the lower limb training mechanism is provided with two sets of swing assemblies which are used for exercising leg strength and are corresponding to human body legs. The freestyle swimming land training device can simulate the status when sportsmen swim so that sportsmen can carry out freestyle swimming training without swimming pools. The invention also provides a swimming training system comprising the above freestyle swimming training device. By means of the system, sportsmen can carry out swimming training without swimming pools.

The invention discloses a physiotherapeutic body builder with the functions of elixir field tonification, lumbar spine traction and back massage. The physiotherapeutic body builder comprises a fixed bracket, a movable bracket, a massage roller, a telescopic rod, a telescopic rack, a spring, a hydraulic oil cylinder, a movable rocking arm, an impact rod, an impact ball, a pull wire, a pulley, a positioning lock fixing belt, a fixed plate and a movable pedal set. The physiotherapeutic body builder is simple in structure and convenient to use, and can be used for making fitness exercise of running and leg strength, finishing the actions of lumbar spine traction and back massage, tonifying the elixir field, physically treating diseases such as lumbar disc herniation, lumbar muscle degeneration and the like, correcting spine deformation and supplementing the vital energy of the elixir field to achieve the purpose of 'the healthy atmosphere exists inside without evil influence', thereby really obtaining the effects of keeping fit, preventing and reducing the diseases and prolonging life.

The invention discloses a supporting leg extension control method, a supporting leg extension controller and a supporting leg extension control system, and a crane. The supporting leg extension control method comprises the following steps: according to pressure information detected by a unit for detecting pressures of an upper chamber and a lower chamber of a supporting leg, determining the gravity borne by the supporting leg; calculating the change rate of the gravity borne by the supporting leg, and the change rate of the gravity borne when the supporting leg extends out surpasses a first threshold, determining that the supporting leg extends out completely; and controlling the supporting leg to automatically retract for a given distance, and locking the extending action of the supporting leg. Through the supporting leg extension control method, the supporting leg extension controller and the supporting leg extension control system, a pressureout problem of the supporting leg can be prevented, detected or eliminated, thus avoiding inaccurate detection of a supporting leg strength caused by pressureout and facilitating safe control of a whole vehicle.

A method of analyzing data obtained from sensors worn on the body of an athlete. The sensors provide both location and physiological data. The sensors provide data to a computer program that can analyze the movement of the athlete and compare it to prior movement or optimal movements. The computer program can determine better motions to optimize performance based on the motion data from the sensors. The program can also determine physiological changes for the athlete, such as for example increasing leg strength, to optimize the performance. The program can also analyze and predict the trajectory of the sports object based on the data obtained regarding the athlete's movements and capabilities.

The invention discloses a leg strength leg swing exercise trainer, and belongs to the field of sports equipment. The leg strength leg swing exercise trainer comprises a middle pulley, a front pulley, a steel wire rope, a back cushion, a rotating wheel, a counterweight unit, handles, a seat cushion, a force transfer support, force application foot pads and a fixing support. When using the leg strength leg swing exercise trainer, a user sits on the seat cushion, the back of the user leans against the back cushion, front-back positions can be adjusted, two hands of the user grip the handles, two shank ankles of the user forcefully push the force application foot pads to swing forwards and upwards, and then two legs of the user are slowly relaxed. A driving wheel can synchronously and correspondingly rotate through a force transfer part, the steel wire rope fixed onto the driving wheel is drawn to move downwards, bypasses the pulleys and finally enters the counterweight unit, and a balancing weight is driven to move up and down. The process is repeated for some times, and leg muscle strength can be trained. The leg strength leg swing exercise trainer is simple in structure, small in size, not limited by sites and time, convenient to carry, easy to operate and wide in applicable range, and is a necessary exercise rehabilitation instrument for professional sports teams and hospitals.