CN110478850B

CN110478850B - Bedside knee joint mobility training device

Info

Publication number: CN110478850B
Application number: CN201910845161.3A
Authority: CN
Inventors: 李治兴; 王�华
Original assignee: Individual
Current assignee: Li Zhixing
Priority date: 2019-09-08
Filing date: 2019-09-08
Publication date: 2021-06-08
Anticipated expiration: 2039-09-08
Also published as: CN110478850A

Abstract

The invention discloses a bedside knee joint mobility training device which comprises a support and a groove, wherein the groove is connected with a first supporting plate, the bottom surface of the first supporting plate is provided with a first chute, a first sliding block and a supporting rod, the first supporting plate is connected with a second supporting plate, the end part of the second supporting plate is movably connected with a telescopic rod, the telescopic rod is connected with a lifting device, the lifting device comprises a stand column, a second chute, a second sliding block and a screw rod transmission mechanism, the screw rod transmission mechanism drives the telescopic rod and the second supporting plate to move up and down, a third sliding block and a fourth sliding block are arranged in the second chute, the third sliding block is connected with an upper limit switch, the fourth sliding block is connected with a lower limit switch, the stand column is provided with a graduated scale, and one side of the graduated scale is provided with a; the device can provide that the knee joint activity degree is taken exercise and is taken exercise initiatively passively, is convenient for observe joint activity degree numerical value in real time, and angle is taken exercise to accurate control knee joint, realizes that the bedside changes knee joint activity degree and takes exercise.

Description

Bedside knee joint mobility training device

Technical Field

The invention relates to the field of knee joint rehabilitation devices, in particular to a bedside knee joint mobility training device.

Background

With the progress of aging, more and more old people face the trouble of orthopedic diseases, wherein the knee joint degenerative osteoarthropathy is a common disease of the old people, such as knee joint femoral arthritis, rheumatoid arthritis and other serious diseases, and as the knee joint is an important load bearing joint of the lower limb, the structure and the function of the knee joint are the most complicated of the joints of the human body, the knee joint directly influences the normal life quality and causes great pain to the patients, more and more patients need to carry out the artificial knee joint replacement. Through knee joint replacement, the damaged knee joint is replaced by the artificial knee joint with bionic performance, so that the knee joint pain can be relieved, the knee joint function can be improved, the knee joint deformity can be corrected, long-term stability can be obtained, the life quality of a patient can be improved, and the knee joint replacement is an effective means for clinically treating knee joint diseases at present.

After the artificial knee joint operation is carried out, in order to ensure that a patient has higher rehabilitation quality, the patient needs to be rehabilitated in time, joint adhesion is prevented, and the activity degree of the knee joint is influenced. Among the proposals for improving the joint mobility of patients are CPM lower limb joint rehabilitation machines, stationary bicycles, autonomous flexion and extension exercises, etc., but the above-mentioned instruments and treatment methods have at least the following problems in the knee joint mobility training: (1) the flexion and extension angle of the knee joint is that the thigh extension line is used as a baseline, the knee joint extends upwards by 5-10 degrees and bends downwards by 120-150 degrees, and due to inconvenience caused by postoperative pain and swelling, many patients drive the shank knee joint to flex and extend by swinging the thigh hip joint during passive training, although the shank swinging angle can meet requirements, the actual flexion and extension angle of the knee joint using the thigh extension line as the baseline is smaller than the swinging angle, the exercise requirements cannot be met, and the exercise effect is not obvious. (2) The normal knee joint extends by 5-10 degrees, bends by 120-150 degrees, can bend by 20 degrees in a small range in the first recovery day after operation, increases by 10-15 degrees every day, can increase by 40-60 degrees in the third day, has higher requirements on the active and passive bending and stretching angles of the joint after operation, the recovery effect of the too small angle is not obvious, the too large angle easily causes strain, but many instruments and manipulations can not display or control the bending and stretching angle of the artificial knee joint in real time during exercise in the actual recovery measures, the standard can not be referred to the patient, the exercise is not facilitated, meanwhile, the patient can not stop exercising in time according to the personal pain tolerance condition in the passive training, and the risk of injury caused by excessive bending and stretching exists. (3) When recovered early, the patient can not walk to the ground, and inconvenient initiative is taken exercise, and when training passively with the help of the apparatus, great apparatus removes inconveniently, and the other recovered exercise of bed receives the restriction, is unfavorable for the patient to use.

Therefore, there is a need for a bedside knee joint mobility training device to overcome the problems of the swing of hip joint during exercise that drives the knee joint flexion and extension angle not to reach the standard, the inability to observe and control the knee joint flexion and extension angle in real time, and inconvenience in use and inconvenience in bedside training.

Disclosure of Invention

The embodiment of the application provides a bedside knee joint mobility training device to overcome the problems that when in exercise, a swing hip joint drives a knee joint to bend and stretch, the knee joint cannot be observed and controlled in real time, and the bedside is not favorable to the bedside due to inconvenience in use.

The embodiment of the application provides a bedside knee joint mobility training device, which comprises a support, wherein a bottom plate is arranged below the support, a circular arc-shaped groove is formed in the bottom plate, a first supporting plate matched with the groove is hinged to one end of the groove, a first sliding groove is formed in the middle position of the lower bottom surface of the first supporting plate, a first sliding block in sliding connection is arranged in the first sliding groove, the first sliding block is connected with the upper surface of the groove through a supporting rod, a limiting hole used for fixing the first sliding block is formed in the lower surface of the first supporting plate, a limiting nut used for fixing the supporting rod is arranged at the end, close to the first supporting plate, of the supporting rod, a second supporting plate is hinged to the other end of the first supporting plate, a telescopic rod is movably connected to the end of the other end of the second supporting plate, and the other end of the telescopic, the lifting device comprises upright posts on two sides, a second chute is arranged on the inner side of each upright post, a second sliding block is connected in the second chute in a sliding manner, the second sliding block is fixedly connected with a square nut of a screw rod transmission mechanism through a connecting rod respectively, a connecting plate is arranged on the other side of the nut and is movably connected with the telescopic rod through a hinge, the nut is matched and connected with a screw rod, the upper end of the screw rod is connected with a stepping motor through a connector, the other end of the screw rod is connected with the bottom plate through a bearing seat, a third sliding block and a fourth sliding block are arranged in the second chute of the upright post on one side, a fixing clamp movably connected with the upright post is connected on the outer side of the third sliding block, a fixing clamp movably connected with the upright post is connected on the outer side of the fourth sliding block, and an upper limit switch is fixedly connected on the, with fixedly connected with is limit switch down on the fixing clip that the fourth slider is connected, the stand leans on second backup pad side be equipped with on the surface be used for showing the first backup pad extension line with the scale of contained angle between the second backup pad, the scale mark has the numerical value side to be equipped with the pointer of instructing numerical value, the pointer tip is located the scale interval value of scale is on the surface, the pointer stiff end is fixed on the connecting plate, step motor go up limit switch, limit switch is connected with the controller electricity in the control box respectively down, be equipped with operating panel on the control box, the control box is connected with brake valve lever through flexible control line.

Preferably, the first supporting plate is arc-shaped, and the two sides of the first supporting plate are provided with corresponding elastic ropes and fixing clamps.

Preferably, the second support plate is arc-shaped, the telescopic rod is fixed on the lower surface of the end part of the second support plate, and the two sides of the second support plate are provided with corresponding elastic ropes and fixing clamps.

Preferably, the end part of the joint of the first support plate and the second support plate is arc-shaped, the end part of the joint of the second support plate and the first support plate is arc-shaped, and an elastic damping device is movably connected below the hinge joint of the first support plate and the second support plate.

Preferably, the support rod is a solid stainless steel rod with the diameter of 1 cm, and the included angle between the bottom plate and the first support plate is controlled to be 35-45 degrees by controlling the vertical height of the support rod.

Preferably, the scale has a numerical value display range of-10 degrees to 90 degrees, the lifting device drives the telescopic rod to move to the uppermost position, and the pointer indicates that the scale has a numerical value of-10 degrees; the lifting device drives the telescopic rod to move to a horizontal position, and the pointer indicates that the numerical value of the graduated scale is 0 degree; the lifting device drives the telescopic rod to move to the lowest position, and the pointer indicates that the numerical value of the graduated scale is 90 degrees.

Preferably, the color of the pointer is red, the pointer is parallel to the scale lines of the graduated scale, and the pointer is made of a stainless steel plate with the thickness of 5 mm.

Preferably, the upper limit switch is located above the second sliding block, the lower limit switch is located below the second sliding block, the pointer is in contact with the upper limit switch, and the stepping motor stops working; the pointer contacts with the lower limit switch, and the stepping motor stops working.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

1. the first supporting plate hinged to the base plate, the second supporting plate, the supporting rods and related parts are arranged, the included angle range of the first supporting plate and the included angle range of the second supporting plate is controlled to be 35-45 degrees, on one hand, affected limbs can be lifted, postoperative detumescence is facilitated, on the other hand, the thigh part can be guaranteed to be fixed, in early and middle-stage rehabilitation training, other parts of the device drive crus and knee joint flexion and extension movement, the effective flexion and extension angle of the crus and knee joints is guaranteed to be controlled to be-10-90 degrees, the problem that the knee joint and the crus are driven to move by thigh swing during exercise to cause the knee joint mobility angle to be incapable of meeting requirements can be avoided, and the exercise effect of the knee joints.

2. The utility model provides a through setting up the scale that corresponds with shank angle of flexion and extension, and make scale and telescopic link, the angle of elevation of second backup pad is corresponding in real time, the pointer can synchronous instruction angle numerical value, when knee joint and shank are taken exercise, elevating gear passes through telescopic link and second backup pad and drives shank and knee joint movement of flexion and extension, the angle of flexion and extension of knee joint and shank can be observed in real time to disease or nursing staff, the patient is according to individual sensation and tolerance degree, can be through the control handle pause in the control hand, the starting gear work, improve the security and the travelling comfort of knee joint activity passive training.

3. The supporting component and the lifting component of this application embodiment can directly be carried to the bed on, the disease can lie on the sick bed, put first backup pad to big or small leg, it is fixed well in the second backup pad, start elevating gear after big or small leg lifting predetermined angle, support first backup pad and thigh with the bracing piece, elevating gear moves from top to bottom, drive knee joint and shank and do and bend and stretch passive training, can make the patient lie and do the knee joint activity degree exercise on the bed, avoid walking the knee joint heavy burden health weight pain that causes down, can carry out joint activity degree rehabilitation to the affected limb in patient postoperative early stage, promote the quick recovery of patient.

4. The utility model provides an all be convex in first backup pad and second backup pad junction, be convenient for bear the weight of knee joint part, set up elastic damping device in both junctions simultaneously, when the patient gets into middle and later stages initiative rehabilitation exercise, can break off being connected of telescopic link and elevating gear as required, the patient drives the second backup pad from main knee joint, use and do knee joint flexion and extension initiative training with first backup pad pin joint as axle center tensile or compression elastic damping device, through the elastic damping device who changes different elasticity coefficients, tensile or compression elastic damping device needs different strength, can effectively train the strength of the muscle of shank and ligament, promote the effect that the joint mobility was tempered, it causes the knee joint discomfort to bear the overweight because of the knee joint bears upper part of the body weight when avoiding getting out of bed to take exercise, realize the bedside use of taking exercise.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a lifting device according to an embodiment of the present application;

FIG. 3 is a schematic view of the lifting device, the scale and the pointer according to the embodiment of the present application;

FIG. 4 is a schematic structural view of a leg supporting device and an elastic damping device according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a first sliding groove, a first sliding block and a limiting hole of a first supporting plate according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a method for marking joint mobility and scale according to an embodiment of the present disclosure;

1. a support; 2. a base plate; 3. a first support plate; 4. a first chute; 5. a first slider; 6. a support bar; 7. a limiting hole; 8. a limit nut; 9. a second support plate; 10. a telescopic rod; 11 a lifting device; 12. a column; 13. a second chute; 14. a second slider; 15. a connecting rod; 16. a screw drive mechanism; 17. a nut; 18. a connecting plate; 19. a screw; 20. a stepping motor; 21. a third slider; 22. a fourth slider; 23. an upper limit switch; 24. a lower limit switch; 25. fixing the card; 26. a graduated scale; 27. a pointer; 28. an elastic damping device.

Detailed Description

Example 1

As shown in fig. 1-6, a bedside knee joint mobility training device comprises a support 1, wherein a bottom plate 2 is arranged below the support 1, the bottom plate 2 is used for supporting the whole device, two groups of support legs which can be rotatably opened and stored on the lower surface of the bottom plate 2 are arranged on two sides of the bottom plate 2, two groups of support legs are symmetrically arranged on two sides of the bottom plate 2, and the support legs are rotatably opened during use so as to enhance the stability of the whole device; when not in use, the utility model can be rotatably stored under the bottom plate 2 to save the storage space; the bottom plate 2 is provided with an arc-shaped groove, one end of the groove is hinged with a first supporting plate 3 matched with the groove, and when the device is not used, the first supporting plate 3 can be put into the groove, so that the storage space is saved; the middle position of the lower bottom surface of the first supporting plate 3 is provided with a first sliding groove 4, a first sliding block 5 in sliding connection is arranged in the first sliding groove 4, the first sliding block 5 is connected with the upper surface of the groove through a supporting rod 6, the lower surface of the first supporting plate 3 is provided with a limiting hole 7 for fixing the first sliding block 5, the end part of the supporting rod 6, close to the first supporting plate 3, is provided with a limiting nut 8 for fixing the supporting rod 6, the first supporting plate 3 is arc-shaped, two sides of the first supporting plate 3 are provided with corresponding elastic ropes and fixing clamps, when in use, the first supporting plate 3 is lifted from the groove, the first supporting plate 3 drives the first sliding block 5 and the supporting rod 6 to move along the first sliding groove 4 until the supporting rod 6 is in a vertical state, at the moment, the first sliding block 5 at the upper end part of the supporting rod 6 is clamped into the limiting hole 7, the size of the limiting hole 7 is larger than that of the first sliding block, the limiting nut 8 is adjusted to fix the supporting rod 6 in the limiting hole 7, the size of the limiting nut 8 is larger than that of the limiting hole 7, the supporting rod 6 can be fixed, and the supporting rod 6 is prevented from shaking or sliding to influence the stability of the device while the supporting function is played for the first supporting plate 3; the elastic ropes and the fixing clamps can be provided with a plurality of groups and are symmetrically arranged at two sides of the first supporting plate 3, and after the thighs of the patient are placed in the first supporting plate 3, the thighs of the patient are fixed by the elastic ropes and the fixing clamps, so that the phenomenon that the swinging or shaking of the thighs influences the exercise of the activity degree of the knee joints when the device works is prevented; the supporting rod 6 is a solid stainless steel rod with the diameter of 1 cm and is used for supporting the weight of legs, the angle range of an included angle between the control bottom plate 2 and the first supporting plate 3 is 35-45 degrees by controlling the vertical height of the supporting rod 6, when the first supporting plate 3 is lifted, the supporting rod 6 is driven by the first sliding block 5 to move along the first sliding groove 4, when the first sliding block 5 at the upper end part of the supporting rod 6 enters the limiting hole 7, the angle range of the included angle between the bottom plate 2 and the first supporting plate 3 is a certain numerical value between 35-45 degrees, and the angle can meet the requirement of clinically lifting the affected limb to reduce the swelling of the affected limb and promote early detumescence; the other end of the first supporting plate 3 is hinged with a second supporting plate 9, the second supporting plate 9 is arc-shaped, a telescopic rod 10 is fixed on the lower surface of the end part of the second supporting plate 9, two sides of the second supporting plate 9 are provided with corresponding elastic ropes and fixing clamps, the second supporting plate 9 is used for supporting the weight of the shank, the telescopic rod 10 is used for being connected with a lifting device 11 so as to drive the second supporting plate 9 and the shank to move, and the elastic ropes and the fixing clamps on the second supporting plate 9 are provided with a plurality of groups which are correspondingly arranged and used for fixing the shank and preventing the shank from shaking on the second supporting plate 9; the end part of the joint of the first supporting plate 3 and the second supporting plate 9 is arc-shaped, the end part of the joint of the second supporting plate 9 and the first supporting plate 4 is arc-shaped, and the arc-shaped parts of the first supporting plate and the second supporting plate conform to the structural shape of the knee joint of a human body, so that the lower part of the knee joint can be conveniently wrapped and supported, and discomfort caused by hanging or excessive support below the knee joint can be prevented; an elastic damping device 28 is movably connected below the hinge joint of the first supporting plate 3 and the second supporting plate 9, the elastic damping device 28 preferably adopts a spring with hooks at two ends, the elastic damping device 28 can be movably disassembled or assembled, and the device is provided with a set of elastic damping devices 28 with different lengths and elastic coefficients; when a patient is in middle and later period rehabilitation and can independently exercise the activity of the knee joint, the connection between the telescopic rod 10 and the lifting device 11 can be selectively disconnected, the elastic damping devices 28 with different lengths and elastic coefficients are selected and used, the elastic damping devices 28 can be stretched or compressed, the patient can drive the second supporting plate 9 by independently using the knee joint, the elastic damping devices 28 are stretched or compressed by taking the hinge point of the first supporting plate 3 as an axis to actively train the flexion and extension of the knee joint, the elastic damping devices 28 with different elastic coefficients are replaced, different forces are needed by stretching or compressing the elastic damping devices 28, the forces of muscles and ligaments of the crus can be effectively trained, the effect of exercising the activity of the joint is improved, the discomfort caused by overweight of the upper body weight born by the knee joint during the off-bed exercise is avoided, and the bedside exercise is realized; the end part of the other end of the second supporting plate 9 is movably connected with a telescopic rod 10, and the telescopic rod 10 is preferably a hydraulic telescopic rod, so that the supporting weight is ensured, and the telescopic effect is more stable during extension and retraction; the other end of the telescopic rod 10 is connected with a lifting device 11, the lifting device 11 comprises upright columns 12 on two sides and is used for supporting the lifting device 11, second sliding grooves 13 are formed in the inner sides of the upright columns 12, second sliding blocks 14 are connected in the second sliding grooves 13 in a sliding mode, the second sliding grooves 13 are as long as the upright columns 12, the stroke of the second sliding blocks 14 is improved to the maximum extent, the second sliding blocks 14 are fixedly connected with square nuts 17 of a screw transmission mechanism 16 through connecting rods 15 respectively, the screw transmission mechanism 16 is a ball screw, preferably a German REXROTH Lishi series ball screw, the lead is 4 mm, the lead is ensured to be small as far as possible when the ball screw is selected, the lifting accuracy of the lifting device 11 is controlled, and the stretching or bending angle of the knee joint is controlled accurately; a connecting plate 18 is arranged at the other side of the nut 17, the connecting plate 18 is movably connected with the telescopic rod 10 through a hinge, the hinge can enable the telescopic rod 10 to rotate up and down 180 degrees around the connecting plate 18, the nut 17 is connected with a screw rod 19 in a matching way, the upper end of the screw rod 19 is connected with a stepping motor 20 through a connector, the stepping motor 20 is fixed on a cross beam between two upright posts 12, the other end of the screw rod 19 is connected with the bottom plate 2 through a bearing seat, a third slide block 21 and a fourth slide block 22 are arranged in a second slide groove 13 of the upright post 12 at one side, the third slide block 21 and the fourth slide block 22 can freely slide in the second slide groove 13, a fixing clamp 25 movably connected with the upright post 12 is connected at the outer side of the third slide block 21, a fixing clamp 25 movably connected with the upright post 12 is connected at the outer side of the fourth slide block 22, an upper limit switch 23 is fixedly connected on the fixing clamp 25, the upper limit switch 23 is positioned above the second sliding block 14, the lower limit switch 24 is positioned below the second sliding block 14, the pointer 27 is contacted with the upper limit switch 23, and the stepping motor 20 stops working; the pointer 27 is in contact with the lower limit switch 24, the step motor 20 stops working, because the safety is particularly important for knee joint replacement patients, in order to improve the safety performance, after the angle range of knee joint mobility training is determined according to medical orders, for example, the angle range is from-1 to 35 degrees, the upper limit switch 23 is moved to the position above the position of the scale 26 corresponding to the end value at the left end of the angle range, namely, the position above the value of-1 degrees, when the lifting device 11 drives the telescopic rod 10 and the second support plate 9 to reach the training angle of upward movement, namely, the angle is from-1 degree, the pointer 27 is in contact with the upper limit switch 23 and triggers the upper limit switch 23 to act, the step motor 20 stops working, and the lifting device 11 does not drive the telescopic rod 10 and the second support plate 9 to move upward any more; the lower limit switch 24 is moved to a position below the position of the right end value of the angle range corresponding to the numerical value of the graduated scale 26, namely, below the numerical value of 35 degrees, when the lifting device 11 drives the telescopic rod 10 and the second supporting plate 9 to reach a training angle of downward movement, namely, 35 degrees, the pointer 27 is in contact with the lower limit switch 24 and triggers the lower limit switch 24 to act, the stepping motor 20 stops working, and the lifting device 11 does not drive the telescopic rod 10 and the second supporting plate 9 to move downward any more; the controller controls the upper limit switch 23 and the lower limit switch 24, and when the pointer 27 triggers the upper limit switch 23 to act, the controller controls the stepping motor 20 to stop forward rotation and then reverse rotation to drive the lifting device 11 to move downwards; when the pointer 27 triggers the lower limit switch 24 to act, the controller controls the stepping motor 20 to stop rotating reversely, then rotates forward to drive the lifting device 11 to move upwards, and the operation is repeated; through the upper limit switch 23, the lower limit switch 24 and the pointer 27, the angle of the telescopic rod 10 and the second supporting plate 9 driving the knee joint to move is limited in the angle range set according to the exercise requirement when the knee joint activity is exercised, so that the injury risk to a patient when the knee joint activity exceeds the preset joint activity range due to misoperation, mechanical failure and other reasons can be effectively avoided; a graduated scale 26 used for displaying an included angle between the extension line of the first supporting plate 3 and the second supporting plate 9 is arranged on the inner side of the upright post 12 close to the side of the second supporting plate 9, the numerical value display range of the graduated scale 26 is-10 degrees to 90 degrees, and-10 degrees to 0 degrees in the numerical value range refer to the included angle between the extension line of the straight line where the thigh is located and the straight line where the knee joint extends upwards during the knee joint activity training and are the stretching angle of the knee joint; the angle of 0-90 degrees in the numerical range is an included angle between a straight line extension line of a thigh when the knee joint mobility is trained and a straight line of a knee joint after the knee joint is bent downwards, and is a knee joint bending angle, and the numerical range can meet the requirement of the knee joint mobility angle during postoperative rehabilitation exercise; during rehabilitation exercise, the numerical value display range of the graduated scale is-10 degrees to 90 degrees, the lifting device 11 drives the telescopic rod 10 to move to the uppermost position, and the pointer 27 indicates that the numerical value of the graduated scale 26 is-10 degrees; the lifting device 11 drives the telescopic rod 10 to move to the position where the first supporting plate 3 and the second supporting plate 9 are in the same straight line, and the pointer 27 indicates that the value of the graduated scale 26 is 0 degree; the lifting device 11 drives the telescopic rod 10 to move to the lowest position, and the pointer 27 indicates that the numerical value of the graduated scale 26 is 90 degrees; as shown in fig. 6, the corresponding value of the knee joint flexion and extension angle and the scale 26 is calculated as follows: when the support rod 6 is in a vertical state, a line segment MN is superposed with a straight line where the first support plate 3 is located, an included angle between the line segment MN and a horizontal line ND is alpha, the range of the alpha is 35-45 degrees, a line segment MB is superposed with a straight line where the second support plate 9 is located, and the line segment MA is the highest position which is reached by the telescopic rod 10 and the second support plate 9 driven by the nut 17 of the screw rod transmission mechanism 16; the line segment MD is the lowest position where the nut 17 of the screw rod transmission mechanism 16 drives the telescopic rod 10 and the second supporting plate 9 to reach; when the thigh is naturally straightened on the first support plate 3 and the shank is naturally straightened on the second support plate 9, the line segment MN and the line segment MB are on the same straight line, and the numerical value on the graduated scale 26 corresponding to the position of the point B is 0 degree; when the knee joint and the lower leg move to coincide with the line segment MA, the knee joint is stretched upwards to the uppermost position, the numerical value on the graduated scale 26 corresponding to the position of the point A is-10 degrees, when the knee joint and the lower leg move to coincide with the line segment MD, the knee joint is bent downwards to the lowermost position, and the numerical value on the graduated scale 26 corresponding to the position of the point D is 90 degrees; when the graduated scale 26 is manufactured, a standard angle ruler is used for measurement as a comparison basis, when the second support plate 9 is located at the MB position, the numerical value corresponding to the graduated scale 26 is 0 degree, the second support plate 9 drives the knee joint to upwards stretch by 1 degree each time, the corresponding value of the second support plate 9 on the graduated scale 26 is reduced by 1 degree from 0 degree and is changed into-1 degree, the second support plate is upwards stretched by 1 degree, the scale value is changed into-2 degree, the second support plate is upwards stretched by 1 degree on the basis of-2 degree, and the scale value is changed into-3 degree … … degree until the numerical value of the graduated scale 26 is marked to-10; according to the same labeling method, when the second support plate 9 is at the MB position, the corresponding scale 26 has a value of 0, the second support plate 9 drives the knee joint to bend downwards by 1 degree each time, the corresponding value of the second support plate 9 on the scale 26 is increased by 1 degree from 0 to become 1 degree, the second support plate bends downwards by 1 degree on the basis of 1 degree, and the scale value is changed to 2 degrees … … until the scale 26 has a value of 90 degrees; the calibrated scale 26 can be copied in a large quantity by taking the calibrated scale which is marked accurately as a template, when the calibrated scale 26 is installed, the first support plate 3 is lifted to the highest position, the value of the calibrated scale 26 corresponding to the position of the second support plate 9 and the first support plate 3 on the same straight line is 0 degree, and the calibrated scale 26 is installed and fixed at the corresponding value; the scale 26 is provided with a pointer 27 for indicating the value on the side marked with the value, and is used for indicating the angle of the knee joint movement and triggering the upper limit switch 23 and the lower limit switch 24 to act; the color of the pointer 27 is red, the pointer 27 is parallel to the scale marks of the graduated scale 26, the pointer 27 is made of a stainless steel plate with the thickness of 5 mm, the pointer 27 is made of red, the red color is striking, observation is easy, the pointer 27 is parallel to the scale marks of the graduated scale 26, reading accuracy is facilitated, the thickness of the pointer 27 is 5 mm, strength of the pointer is improved, and the pointer 27 is prevented from being stressed and deformed when the upper limit switch 23 and the lower limit switch 24 are triggered to act; the indicating end of the pointer 27 is positioned on the scale value surface of the graduated scale 6, and the fixed end of the pointer 27 is fixed on the connecting plate 18 and can move up and down along with the lifting device 11; the stepping motor 20, the upper limit switch 23 and the lower limit switch 24 are respectively electrically connected with a controller in the control box, and the control box is provided with an operation panel, so that the start-stop and working time of the stepping motor 20 can be conveniently adjusted and controlled; the control box is connected with a control handle through a telescopic control line, a 'working' button and a 'stopping' button are arranged on the control handle, so that a patient can control the working and the stopping of the stepping motor 20 according to the stretching or bending angle of the lifting device 11 and the tolerance degree of the patient during training, and the situation that the knee joint is stretched or bent excessively and exceeds the tolerance degree of the patient to cause pain is prevented; can set up the exercise time on the control box, set up the exercise time and after beginning work, the controller begins the timing, when reaching to predetermine the exercise time after, the device automatic shutdown work to sound or speech signal suggestion are taken exercise and are accomplished.

Example 2

A working method of the bedside knee joint mobility training device is as follows: when a patient needs to take exercise, the device is moved to a sickbed, the supporting legs below the bottom plate 2 are rotated to be opened, the thighs on the knee joint replacement side of the patient are placed on the first supporting plate 3, the calves are placed on the second supporting plate 9, the thighs and the calves are respectively fixed by the elastic ropes and the fixing clamps, then the stepping motor 20 is started to drive the lifting device 11 to move upwards, the lifting device 11 drives the telescopic rod 10, the second supporting plate 9 and the first supporting plate 3 to move upwards, the stepping motor 20 is stopped to work until the lifting device 11 drives the pointer 27 above the connecting plate 18 to indicate the numerical value of 0 degree on the graduated scale 27, the thighs, the calves and the telescopic rod 10 are on the same straight line, the mobility of the knee joint is 0 degree, meanwhile, the first sliding block 5 on the upper portion of the supporting rod 6 is clamped into the limiting hole 7 at the moment, the limiting nut 8 is adjusted, the stability of the first support plate 3 is ensured; according to the postoperative rehabilitation condition of a patient and clinical knee joint activity exercise advice, determining the range of a preset value for exercising the knee joint activity, adjusting an upper limit switch 23 and a fixing clamp on an upright post 12 to enable a third slide block 21 to slide in a second slide groove 14 until the switch action position of the upper limit switch 23 is equal to the upward stretching angle value of the knee joint activity at the position corresponding to the numerical value of a graduated scale 26, adjusting a lower limit switch 24 and the fixing clamp on the upright post 12 to enable a fourth slide block 22 to slide in the second slide groove 14 until the action position of the lower limit switch 24 is equal to the downward bending angle value of the knee joint activity at the position corresponding to the numerical value of the graduated scale 26, and then starting the device to work by pressing a 'working' key from a control box or a control handle; after the knee joint stretching device starts to work, the stepping motor 20 rotates forwards to drive the lifting device 11, the telescopic rod 10 and the second supporting plate 9 to ascend, the knee joint is stretched, when the knee joint moves upwards to a preset value, the pointer 27 triggers the upper limit switch 23 to act, the stepping motor 20 stops rotating forwards, and the knee joint reaches a preset stretching angle; then the stepping motor 20 rotates reversely under the control of the controller and drives the lifting device 11, the telescopic rod 10 and the second supporting plate 9 to descend, the knee joint is bent, when the stepping motor moves downwards to a preset value, the pointer 27 triggers the lower limit switch 24 to act, the stepping motor 20 stops rotating reversely, and the knee joint reaches a preset bending angle; then the stepping motor 20 rotates forwards to drive the lifting device 11, the telescopic rod 10 and the second supporting plate 9 to ascend, the knee joint bending degree reaches 0 degree and then the knee joint is stretched, then the pointer 27 triggers the upper limit switch 23 to act, the stepping motor 20 stops forward transmission and rotates backwards, the bending and stretching training is repeated until the exercise time set in the control box is reached, the device stops working, and the exercise is prompted to be completed; when the device needs to be disassembled, the stepping motor 20 is started firstly, the lifting device 11 is driven to move to enable the pointer 27 to reach a numerical value of 0 degree, at the moment, the thigh on the first supporting plate 3 and the shank on the second supporting plate 9 are on the same straight line, the shank is lifted, the limiting nut 8 is loosened, the first sliding block 5 is taken out of the limiting hole 7, the lower limiting switch 24 is adjusted to the lowest position, the stepping motor 20 is started to move to the lowest position, the elastic rope and the fixing clamp for fixing the thigh and the shank are unfastened, the thigh and the shank of a patient are moved down from the device, the device is recovered, and the knee joint rehabilitation exercise is completed.

Example 3

A bedside knee joint mobility training device can also be used for exercising when patients recover in the middle and later stages. During the middle and later stages of the rehabilitation of the patient, the replaced knee joint has higher stability, and the muscle strength and ligament strength of the patient are also greatly recovered, so that the active training of the activity of the knee joint can be performed according to the strength of the patient; when the device is used, the connection between the telescopic rod 10 and the lifting device 11 is firstly disconnected, the bottom plate 2, the first supporting plate 3, the second supporting plate 9 and other parts of the device are placed on a sickbed, and the supporting legs below the bottom plate 2 are rotated to be opened, so that the stability of the device is ensured; putting thighs into a first supporting plate 3 and fixing the thighs by using elastic ropes and fixing clamps, putting shanks into a second supporting plate 9 and fixing the thighs by using elastic ropes and fixing clamps, then lifting the second supporting plate 9 and the shanks to drive the first supporting plate 3 and the thighs to be raised, driving a supporting rod 6 to be vertical to the supporting rod 6 under the driving of a first sliding block 5, clamping the first sliding block 5 into a limiting hole 7, fixing the supporting rod by using a limiting nut 8 to ensure the stability of the first supporting plate 3 and the thighs, then selectively installing corresponding elastic damping devices 28 according to the forces of the shanks and knee joints of patients, respectively connecting the lower parts of the first supporting plate 3 and the second supporting plate 9 through hooks, then releasing the shanks and the second supporting plate 9, enabling the patients to independently control the moving angles of the shanks and the knee joints, driving the second supporting plate 9 through the shanks, stretching or compressing the elastic damping devices 28, independently stretch and crooked training, hold shank and second backup pad 9 after the exercise, take off the elastic damping dress, 29, loosen limit nut 8, take out first slider 5 from spacing hole 7, lay shank and second backup pad 9, first backup pad 3 flat, untie the stretch cord and the fixing clip on thigh, shank, recovery unit.

In summary, the first support plate, the second support plate, the support rod and related components which are hinged with the bottom plate are arranged, and the included angle range of the first support plate, the second support plate, the support rod and the related components is controlled to be 35-45 degrees, so that on one hand, a diseased limb can be lifted, postoperative swelling can be relieved, on the other hand, the thigh part can be ensured to be fixed, in early and middle-stage rehabilitation training, other components of the device drive the crus and the knee joints to do flexion and extension movement, the effective flexion and extension angle of the crus and the knee joints is ensured to be controlled to be-10-90 degrees, and the problem that the knee joint mobility angle cannot meet the requirement due to the fact that the knee joints; the scale corresponding to the flexion and extension angles of the lower leg is also arranged, the scale is enabled to correspond to the lifting angles of the telescopic rod and the second supporting plate in real time, the pointer can synchronously indicate angle values, a patient or a nursing staff can observe the flexion and extension angles of the knee joint and the lower leg in real time during exercise, the patient can pause and start the device to work by controlling the control handle in the hand according to personal feeling and tolerance degree, and the safety and comfort of passive training of the knee joint activity are improved; the device can be directly carried to a bed during exercise, so that a patient can lie on the bed to do knee joint movement exercise, and pain caused by walking when the patient goes down the ground is avoided; set up the elastic damping device in first backup pad and second backup pad junction, when the patient gets into the recovered exercise of middle and later stages, can break off telescopic link and elevating gear's being connected as required, the patient drives the second backup pad from main knee joint, use and do the knee joint with first backup pad pin joint as the axle center tensile or compression elastic damping device and bend and stretch the initiative training, elastic damping device through changing different elasticity coefficients, tensile or compression elastic damping device needs different strength, can effectively train the muscle of shank and the strength of ligament, promote the effect that the joint activity was taken exercise, it causes the overweight and cause the discomfort because of the knee joint bears upper part of the body weight to avoid when getting off the bed and taking exercise, realize that the bed is by side to take exercise and use.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or that certain features may be substituted for those skilled in the art, and all changes, equivalents, and improvements that fall within the spirit and scope of the invention are therefore intended to be embraced by the appended claims.

Claims

1. A bedside knee joint mobility training device comprises a support and is characterized in that a bottom plate is arranged below the support, a circular-arc-shaped groove is formed in the bottom plate, a first supporting plate matched with the groove is hinged to one end of the groove, a first sliding groove is formed in the middle of the lower bottom surface of the first supporting plate, a first sliding block in sliding connection is arranged in the first sliding groove, the first sliding block is connected with the upper surface of the groove through a supporting rod, a limiting hole used for fixing the first sliding block is formed in the lower surface of the first supporting plate, a limiting nut used for fixing the supporting rod is arranged at the end, close to the first supporting plate, of the supporting rod, a second supporting plate is hinged to the other end of the first supporting plate, the end of the joint of the first supporting plate and the second supporting plate is arc-shaped, the end of the joint of the second supporting plate and the first supporting plate is arc-shaped, an elastic damping device is movably connected below the hinge joint of the first supporting plate and the second supporting plate, the end part of the other end of the second supporting plate is movably connected with a telescopic rod, and the other end of the telescopic rod is connected with a lifting device;

the lifting device comprises upright posts on two sides, a second chute is arranged on the inner side of each upright post, a second sliding block is connected in the second chute in a sliding manner, the second sliding block is fixedly connected with a square nut of a screw rod transmission mechanism through a connecting rod respectively, a connecting plate is arranged on the other side of the nut and is movably connected with the telescopic rod through a hinge, the nut is matched and connected with a screw rod, the upper end of the screw rod is connected with a stepping motor through a connector, the other end of the screw rod is connected with the bottom plate through a bearing seat, a third sliding block and a fourth sliding block are arranged in the second chute of the upright post on one side, a fixing clamp movably connected with the upright post is connected on the outer side of the third sliding block, a fixing clamp movably connected with the upright post is connected on the outer side of the fourth sliding block, and an upper limit switch is fixedly connected on the, a lower limit switch is fixedly connected to the fixing clamp connected with the fourth sliding block;

a graduated scale used for displaying an included angle between the extension line of the first supporting plate and the second supporting plate is arranged on the inner side of the upright column close to the side of the second supporting plate, a pointer for indicating a numerical value is arranged on the numerical value side of the graduated scale, the pointer indicating end is positioned on the surface of the graduated value of the graduated scale, the pointer fixing end is fixed on the connecting plate, the upper limit switch is positioned above the second sliding block, the lower limit switch is positioned below the second sliding block, the pointer is in contact with the upper limit switch, and the stepping motor stops working; the pointer is in contact with the lower limit switch, and the stepping motor stops working;

the stepping motor, go up limit switch, limit switch is connected with the controller electricity in the control box respectively down, be equipped with operating panel on the control box, the control box is connected with control handle through flexible control line.

2. The bedside knee joint mobility training device of claim 1, wherein the first support plate is circular, and the two sides of the first support plate are provided with corresponding elastic ropes and fixing clips.

3. The bedside knee joint mobility training device of claim 1, wherein the second support plate is arc-shaped, the telescopic rod is fixed to the lower surface of the end of the second support plate, and corresponding elastic ropes and fixing clips are arranged on two sides of the second support plate.

4. The bedside knee joint mobility training device of claim 1, wherein the support rod is a solid stainless steel rod with a diameter of 1 cm, and the vertical height of the support rod is controlled to control the included angle between the bottom plate and the first support plate to be 35-45 °.

5. The bedside knee joint mobility training device of claim 1, wherein the scale has a numerical value in a range of-10 ° to 90 °, the lifting device drives the telescopic rod to move to an uppermost position, and the pointer indicates that the scale has a numerical value of-10 °; the lifting device drives the telescopic rod to move to the position where the first supporting plate and the second supporting plate are located on the same straight line, and the pointer indicates that the numerical value of the graduated scale is 0 degree; the lifting device drives the telescopic rod to move to the lowest position, and the pointer indicates that the numerical value of the graduated scale is 90 degrees.

6. The bedside knee joint activity training device of claim 1, wherein the pointer is red, the pointer is parallel to the scale lines, and the pointer is made of a stainless steel plate with a thickness of 5 mm.