CN107041825B - Postoperative elbow knee joint rehabilitation device - Google Patents

Postoperative elbow knee joint rehabilitation device Download PDF

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Publication number
CN107041825B
CN107041825B CN201710351132.2A CN201710351132A CN107041825B CN 107041825 B CN107041825 B CN 107041825B CN 201710351132 A CN201710351132 A CN 201710351132A CN 107041825 B CN107041825 B CN 107041825B
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China
Prior art keywords
assembly
display
end cover
driving
gear
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CN201710351132.2A
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Chinese (zh)
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CN107041825A (en
Inventor
叶红朝
周超杰
黄明钧
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Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
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Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
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Priority to CN201710351132.2A priority Critical patent/CN107041825B/en
Publication of CN107041825A publication Critical patent/CN107041825A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00—Apparatus for passive exercising; Vibrating apparatus ; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02—Stretching or bending or torsioning apparatus for exercising
    • A61H1/0237—Stretching or bending or torsioning apparatus for exercising for the lower limbs
    • A61H1/024—Knee
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00—Apparatus for passive exercising; Vibrating apparatus ; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02—Stretching or bending or torsioning apparatus for exercising
    • A61H1/0274—Stretching or bending or torsioning apparatus for exercising for the upper limbs
    • A61H1/0277—Elbow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/12—Driving means
    • A61H2201/1207—Driving means with electric or magnetic drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/14—Special force transmission means, i.e. between the driving means and the interface with the user
    • A61H2201/1463—Special speed variation means, i.e. speed reducer
    • A61H2201/1472—Planetary gearing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16—Physical interface with patient
    • A61H2201/1602—Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
    • A61H2201/1635—Hand or arm, e.g. handle
    • A61H2201/1638—Holding means therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16—Physical interface with patient
    • A61H2201/1602—Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
    • A61H2201/164—Feet or leg, e.g. pedal
    • A61H2201/1642—Holding means therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16—Physical interface with patient
    • A61H2201/1657—Movement of interface, i.e. force application means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2205/00—Devices for specific parts of the body
    • A61H2205/10—Leg
    • A61H2205/102—Knee

Abstract

The invention discloses a postoperative elbow and knee joint rehabilitation device, and belongs to the field of rehabilitation instrument equipment. The prior art scheme has a complex structure and a narrow application range, and can not bend and stretch at a small angle. The postoperative elbow and knee joint rehabilitation device comprises a joint supporting assembly and a driving mechanism, wherein the driving mechanism comprises a display assembly, a locking assembly, a speed reducing assembly and a driving source; the joint support assembly comprises a forearm plate and a rear arm plate, the display assembly comprises a pinion connected with the speed reduction assembly and a display wheel used for displaying rotation angles, the display wheel is connected with the pinion through a driving wheel, an end cover used for protecting the speed reduction assembly is arranged on the outer end face mask of the speed reduction assembly and the outer end face mask of the display assembly, and a notch used for displaying the scales of the circumferential surface of the display wheel is formed in the position, corresponding to the display wheel, of the end cover. The invention is provided with the speed reducing component and the locking component, can perform micro-angle rehabilitation training, has simple structure and practical proposal.

Description

Postoperative elbow knee joint rehabilitation device
Technical Field
The invention relates to a postoperative elbow and knee joint rehabilitation device, and belongs to the field of rehabilitation instrument equipment.
Background
After elbow joint surgery such as elbow joint fracture, distal humerus fracture and olecranon fracture, plaster is bound as a treatment means, and the injured part is fixed, and the plaster is removed generally about one month. Because the arms are fixed for a long time, lack of muscle exercise during the period can lead to muscle disuse atrophy, thereby causing the elbow joint to be stiff after operation, and only maintaining the angle when beating gypsum. At present, auxiliary technologies such as massage, thermal therapy, gas therapy, wax therapy, acupuncture and the like are generally adopted by hospitals, the whole rehabilitation process is recovered by a manual method little by little, about two months are needed, during which patients need to frequently run in the hospitals, and a great deal of time and money are spent.
Chinese patent (application number 201410196915.4) discloses an exoskeleton type upper limb rehabilitation robot, when an electromagnetic clutch is engaged, a first connecting pin and a second connecting pin are pulled out to disconnect the connection between a sleeve and a second transmission shaft, a servo motor drives the first transmission shaft to rotate through a speed reducer and a coupler, 90-degree motion conversion of a fourth transmission shaft is realized through meshing of a first bevel gear and a second bevel gear, the motion is transmitted to a third transmission shaft through the electromagnetic clutch, a first forearm support plate and a gear support plate are driven to move together through the third transmission shaft, and a wrist of a person is fixed in a gear ring of a second cylindrical gear, so that bending and stretching motion of an elbow joint is realized. The technical scheme is complex in structure and narrow in application range, the bevel gear is adopted for transmission, the first forearm support plate and the gear support plate are driven to move together, bending and stretching movement of the elbow joint is achieved, 90-degree bending and stretching of the joint can be achieved, but in actual conditions, bending and stretching of a small angle is needed for many rehabilitation exercises, and the prior art does not find the technology.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the postoperative elbow and knee joint rehabilitation device which can help fracture joints to recover as soon as possible, has a low input cost, is simple in structure and can perform micro-angle rehabilitation training.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the postoperative elbow knee joint rehabilitation device comprises a joint supporting component for fixing the arm of a patient and a driving mechanism for driving the arm of the patient to bend, wherein the driving mechanism comprises a display component for displaying a rotation angle, a locking component for locking the position of the joint supporting component, a speed reducing component for driving the joint supporting component to slowly rotate and an external independent driving source for driving the speed reducing component to rotate; the joint supporting component comprises a forearm plate connected with the front end of the elbow knee joint and a rear arm plate connected with the rear end of the elbow knee joint, the display component comprises a pinion connected with the speed reducing component and a display wheel used for displaying the rotation angle, the display wheel is connected with the pinion through a driving wheel, an end cover used for protecting the speed reducing component is arranged on the speed reducing component and a mask arranged at the outer end of the display component, and a notch used for displaying the scale of the circumference of the display wheel is formed in the position of the end cover corresponding to the display wheel.
The invention is provided with the speed reducing component and the locking component, can help patients to carry out micro-angle rehabilitation training on the elbow and knee joint, has simple structure and practical proposal. Because the rehabilitation device needs to be fixed at the arm or knee of a patient for a long time, the size of the driving source is large, the weight is heavy, the external driving source is adopted, when the bending angle of the joint supporting component needs to be adjusted, the speed reducing component is inserted with the driving source to adjust the bending angle of the joint supporting component, and when the angle adjustment is completed, the driving source is taken down, so that the wearing weight of the rehabilitation device is reduced. The invention is provided with the display component, when rehabilitation training is carried out, the front arm plate is a movable end, the rear arm plate is a fixed end, the movable angle of the front arm plate is known in time, doctors and patients can be helped to know the rehabilitation condition, and a follow-up scheme is formulated.
As an improvement optimization technical measure, the scales are uniformly arranged on the circumference of the display wheel, the scale range is from-90 degrees to 90 degrees, the angle of the front arm plate and the rear arm plate is 0 degree when the front arm plate and the rear arm plate are vertical, the upward rotation angle is positive, the downward rotation angle is negative, the normal use habit is met, and the display wheel is simple and practical.
As an improvement and optimization technical measure, the display wheel is an annular gear which is rotatably connected with the end cover, the pinion drives the display wheel to rotate, and the inner ring of the display wheel is provided with teeth, so that the covering area of the end cover can be reduced, and the volume of the display wheel is reduced.
As an improvement and optimization technical measure, the locking component comprises a ratchet wheel fixedly connected with the speed reducing component and a pawl capable of preventing the ratchet wheel from rotating, an end cover for protecting the speed reducing component is arranged on the outer end face of the speed reducing component, and an adjusting button for driving the pawl to move is arranged on the end cover.
The locking component is provided with a ratchet and a pawl, and by utilizing the movement characteristic of a ratchet mechanism, when the pawl is clamped in a ratchet groove, the ratchet cannot rotate reversely, so that the locking requirement is met, and when the pawl is lifted, the ratchet rotates, so that the position of the front arm plate can be accurately and effectively controlled.
As an improvement and optimization technical measure, the driving source is provided with a shell for covering the driving source, one surface of the shell, which is in contact with the end cover, is provided with an inclined plane groove, and the inclined plane groove is inserted with an adjusting button to drive the adjusting button to move. In order to conveniently control the movement of the pawl, an adjusting knob is designed, the adjusting knob is connected with the pawl, and a corresponding 45-degree inclined plane groove is formed in a shell of the driving source. When the shell of the external driving source is buckled with the end cover, the adjusting button is pushed upwards by the inclined surface groove, the pawl is retracted into the cavity of the end cover, the ratchet wheel can rotate at will, and the forearm plate can also rotate up and down. When the shell of external drive source is pulled out, the adjusting knob moves down, and then the pawl moves down, blocks the ratchet, and the ratchet can't reverse to prevent that the arm from moving up, satisfy the requirement of locking position, only insert the drive source, decelerator assembly and forearm board just can rotate, carry out the linkage mechanism, can effectively avoid the misoperation of forearm board.
As an improvement and optimization technical measure, a convex block for inserting the end cover is arranged on the contact surface of the shell and the end cover, and a containing groove is arranged on the end cover at a position corresponding to the convex block; the shape of the protruding block and the accommodating groove is triangular, and the corners of the protruding block and the accommodating groove are subjected to chamfering treatment. The protruding block is inserted into the accommodating groove, so that the driving source is reliably connected with the driving mechanism, and the structure is simple and practical.
As an improvement optimization technical measure, the speed reduction assembly comprises a power gear connected with the power output end of the driving source, and a sun gear fixedly connected with the rear arm plate or integrally arranged, wherein the power gear penetrates through the end part of the front arm plate and drives the front arm plate to rotate through interference fit, one end of the power gear is provided with a radial groove for being matched with the power output end of the driving source to rotate, the power output end is provided with a tenon capable of being falcon connected with the radial groove, the tenon can be inserted into the radial groove of the power gear, power transmission is achieved, and rapid alignment, combination and disassembly of the speed reduction assembly and the driving source can be achieved.
As an improvement and optimization technical measure, the sun gear is an annular gear which is arranged at the end part of the rear arm plate, the rear arm plate is made of metal materials, an accommodating cavity for accommodating the sun gear is formed in the end part of the rear arm plate, and the sun gear is formed in the inner end surface of the accommodating cavity.
As an improvement and preferred technical measure, the power gear drives a planetary gear to rotate on the sun gear, and the number of teeth of the planetary gear is more than that of the power gear and less than that of the sun gear. By utilizing the characteristic of large transmission ratio of the planetary gear train, the mechanism realizes large speed reduction in a small space, and the descending speed of the arm is stable and slow.
Compared with the prior art, the invention has the following beneficial effects:
the invention is provided with the speed reducing component and the locking component, can perform micro-angle rehabilitation training, has simple structure, low manufacturing cost and practical proposal.
Because the rehabilitation device needs to be fixed at the arm or knee of a patient for a long time, the size of the driving source is large, the weight is heavy, the external driving source is adopted, when the bending angle of the joint supporting component needs to be adjusted, the speed reducing component is inserted with the driving source to adjust the bending angle of the joint supporting component, and when the angle does not need to be adjusted, the driving source is taken down, so that the wearing weight of the rehabilitation device is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention (excluding the driving source);
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic diagram of an assembly of a reduction assembly of the present invention;
FIG. 4 is a schematic diagram of an end cap structure according to the present invention;
FIG. 5 is a schematic view of the end cap of the present invention tilted at an angle;
FIG. 6 is a schematic view of the assembly of the locking assembly and end cap of the present invention;
FIG. 7 is a schematic view of a locking assembly of the present invention;
FIG. 8 is a schematic diagram of a housing structure of a driving source according to the present invention;
FIG. 9 is a schematic view showing a structure in which a housing of a driving source of the present invention is inclined at a certain angle;
FIG. 10 is a schematic diagram of a display assembly according to the present invention;
FIG. 11 is a schematic view of an assembly of the display assembly and locking assembly of the present invention;
FIG. 12 is a schematic view of the assembly of the display assembly and the end cap of the present invention.
Reference numerals illustrate:
the device comprises a 1-joint support assembly, a 2-speed reduction assembly, a 3-locking assembly, a 4-display assembly, a 5-end cover, a 6-shell, a 12-forearm plate, a 11-rear arm plate, a 21-power gear, a 22-planetary gear, a 23-sun gear, a 211-radial groove, a 31-ratchet wheel, a 32-pawl, a 33-connecting plate, a 34-adjusting block, a 341-inclined surface structure, a 41-display wheel, a 42-pinion, a 43-driving wheel, a 51-accommodating groove, a 52-through groove, a 53-notch, a 61-inclined surface groove and a 62-protruding block.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the invention as defined by the appended claims. Further, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. The present invention will be fully understood by those skilled in the art without the details described herein.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it may be directly connected to another element or may be present with intervening elements. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
1-2, a rehabilitation device for elbow and knee joint postoperative stiffness comprises a joint support assembly 1 for fixing a patient arm and a driving mechanism for driving the patient arm to bend. The joint support assembly 1 comprises a forearm plate 12 connected to the front end of the elbow and knee joint, and a rear arm plate 11 connected to the rear end of the elbow and knee joint. The driving mechanism comprises a speed reduction assembly 2 for driving the joint support assembly 1 to slowly rotate, a locking assembly 3 for locking the position of the joint support assembly 1, a display assembly 4 for displaying the rotation angle, and an external independent driving source for driving the speed reduction assembly 2 to rotate.
In the specific embodiment shown in fig. 3, the speed reducing assembly 2 includes a power gear 21 connected to a power output end of the driving source, and a sun gear 23 fixedly connected to or integrally provided with the rear arm plate 11. The sun gear 23 is an annular gear, and is disposed at an end of the rear arm plate 11. The power gear 21 drives a planetary gear 22 to rotate on the sun gear 23, and the number of teeth of the planetary gear 22 is greater than the number of teeth of the power gear 21 and smaller than the number of teeth of the sun gear 23. By utilizing the characteristic of large transmission ratio of the planetary gear train, the mechanism realizes large speed reduction in a small space, and the descending speed of the arm is stable and slow. The invention is provided with the speed reducing component and the locking component, can help patients to carry out micro-angle rehabilitation training on the elbow and knee joint, has simple structure and practical proposal.
The planetary gears 22 are uniformly arranged between the sun gears 23 of the power gears 21, and the number of the planetary gears 22 is at most 3. The rear arm plate 11 is made of metal materials, an accommodating cavity for accommodating the sun gear 23 is formed in the end portion of the rear arm plate, and the sun gear is formed in the inner end face of the accommodating cavity.
The power gear 21 one end wears to locate forearm board 12 tip and drives forearm board 12 through interference fit and rotate, and the other end is equipped with the radial recess 211 that is used for the power take off end pivoted of cooperation actuating source, the power take off end is equipped with can with radial recess 211 tenon that the falcon connects, can insert in the radial recess 211 of power gear 21, realizes the transmission of power, can realize that the quick counterpoint of reduction assembly 2 and actuating source, combination, dismantlement.
In the specific embodiment shown in fig. 4-7, the locking assembly 3 includes a ratchet 31 fixedly connected with the speed reducing assembly 2, and a pawl 32 capable of preventing the ratchet 31 from rotating, an end cover 5 for protecting the speed reducing assembly 2 is covered on the outer end of the speed reducing assembly 2, and an adjusting button for driving the pawl 32 to move is arranged on the end cover 5. The pawl 32 is connected to an elastic member for maintaining the locked state of the pawl 32, and one end of the elastic member is connected to the pawl 32 and the other end is connected to the end cap 5 so that the pawl is always maintained in the locked state. The driving source is provided with a shell 6 for covering the driving source, the surface of the shell 6 contacted with the end cover 5 is provided with an inclined plane groove 61, the inclined surface groove 61 is inserted with an adjusting button to drive the adjusting button to move.
The locking component 3 is provided with the ratchet wheel 31 and the pawl 32, and by utilizing the movement characteristics of the ratchet wheel 31 mechanism, when the pawl 32 is clamped in a groove of the ratchet wheel 31, the ratchet wheel 31 cannot rotate reversely, so that the locking requirement is met, and when the pawl 32 is lifted, the ratchet wheel 31 rotates.
In order to conveniently control the movement of the pawl, an adjusting knob is designed, the adjusting knob is connected with the pawl, and a corresponding 45-degree inclined plane groove is formed in a shell of the driving source. When the shell of the external driving source is buckled with the end cover, the adjusting button is pushed upwards by the inclined plane groove, the pawl is retracted into the cavity of the end cover against the elasticity of the elastic piece, the ratchet wheel can rotate at will, and the forearm plate can also rotate up and down. When the shell of external drive source is pulled out, the adjusting knob moves down, and then the pawl moves down, blocks the ratchet, and the ratchet can't reverse to prevent that the arm from moving up, satisfy the requirement of locking position, only insert the drive source, decelerator assembly and forearm board just can rotate, carry out the linkage mechanism, can effectively avoid the misoperation of forearm board.
The surface of the shell 6, which is in contact with the end cover 5, is provided with a protruding block 62 for inserting the end cover 5, and the end cover 5 is provided with a containing groove 51 at a position corresponding to the protruding block 62. The protruding block 62 and the accommodating groove 51 are triangular in shape, and corners thereof are chamfered.
The adjusting button comprises a connecting plate 33 connected with the pawl 32 and an adjusting block 34 protruding out of the surface of the end cover 5, and the adjusting block and the connecting plate are of an integrated structure. The surface of the end cover 5 is provided with a through groove 52 for accommodating the adjusting block 34, and the end surface of the adjusting block 34 is provided with a bevel structure 341 which can be matched with the accommodating groove 51 and is subjected to chamfering.
The driving source is an external independent rotating motor, and the rotating speed of the driving source is 5r/min. Because the rehabilitation device needs to be fixed at the arm or knee of the patient for a long time, the driving source has larger size and heavier weight, and the external driving source is adopted, when the bending angle of the joint supporting component 1 needs to be adjusted, the speed reducing assembly 2 is inserted with a driving source to adjust the bending angle of the joint supporting assembly 1, and when the angle adjustment is completed, the driving source is taken down, so that the wearing weight of the invention is reduced.
In the embodiment shown in fig. 8-12, the display assembly 4 includes a pinion 42 connected with the reduction assembly 2, and a display wheel 41 for displaying a rotation angle, the display wheel 41 is connected with the pinion 42 through a driving wheel 43, an end cover 5 for protecting the reduction assembly 2 is covered on the outer end of the reduction assembly 2 and the outer end of the display assembly 4, and a notch 53 for displaying a scale on the circumferential surface of the display wheel 41 is formed in a position corresponding to the display wheel 41 on the end cover 5. The notch 53 is arranged on the end face of the end cover 5, and the size of the notch 53 is matched with the scale. The scale is evenly arranged on the circumferential surface of the display wheel 41, the scale range is from-90 degrees to 90 degrees, the angle of the front arm plate and the rear arm plate is 0 degrees when the front arm plate is vertical, the upward rotation angle is positive, the downward rotation angle is negative, and the display wheel meets the normal use habit, and is simple and practical. The display wheel 41 is an annular gear, which is rotatably connected with the end cover 5.
The invention is provided with the display component 4, when rehabilitation training is carried out, the front arm plate 12 is a movable end, the rear arm plate 11 is a fixed end, knowing the angle of movement of the forearm plate 12 in time can help doctors and patients to know the condition of recovery and make follow-up solutions. The end cap is provided with a notch 53 to indicate the degree of rotation of the forearm plate 12.
The driving source comprises a stc singlechip, a 12v direct current forward and reverse motor and a 12v small lithium battery. The invention selects the miniature low-speed 12V motor of Xinda 37 direct current, the motor is small in size, but the moment reaches 20W, and the requirements of rehabilitation patients can be met. For portability, the power source is required to be driven by a belt power source, the power source is small in size and can be repeatedly charged, and a lithium battery with 1600 milliamps and 12V is selected for the purpose.
For weight saving, the front arm plate and/or the rear arm plate can be provided with a plurality of weight-reducing holes. The front arm plate 12 is rotatably connected with the rear arm plate 11, and a protection pad is arranged at the connection position. The forearm board 12 and the rear arm board 11 are respectively connected with two groups of binding band components, and each binding band component comprises a sponge cushion block fixedly connected with the arm board and a magic tape capable of being attached to the end part of the sponge cushion block. The length of the magic tape is 350-410mm. In order to adapt to the length, the thickness and the design of arms of different patients, an adjustable binding belt component is designed, and the adjustable binding belt component can slide and lock on a front arm plate and a rear arm plate, so that the adjustable binding belt is convenient and flexible.
The invention needs to meet the requirements of rehabilitation actions: the forearm swings downward, the forearm swings upward, and the forearm swings up and down. The three actions can be realized by controlling the switch and the forward and backward rotation of the motor, the volume of the instrument is smaller, and the volume of the controller is required to be smaller. Therefore, the development board of the singlechip is selected, the required circuit board is welded, and writing a program and importing the program into a chip.
A main switch is arranged on the side face of the shell of the driving source, and three adjusting buttons are arranged on the surface of the main switch: forward rotation, reverse rotation and movement. When the angle of the front arm plate 12 is adjusted, and joint muscle rehabilitation training is desired, a movable button on the surface of the shell can be pressed, and the single-chip microcomputer is used for controlling the motor to rotate positively and negatively, so that the elbow joint or the knee joint can swing within a certain range, and the elbow joint or the knee joint function training requirement is met.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (1)

1. The postoperative elbow and knee joint rehabilitation device comprises a joint supporting component (1) for fixing the arm of a patient and a driving mechanism for driving the arm of the patient to bend, and is characterized in that the driving mechanism comprises a display component (4) for displaying a rotation angle, a locking component (3) for locking the position of the joint supporting component (1), a speed reducing component (2) for driving the joint supporting component (1) to slowly rotate and an external independent driving source for driving the speed reducing component (2) to rotate; the joint support assembly (1) comprises a forearm plate (12) connected with the front end of an elbow knee joint and a rear arm plate (11) connected with the rear end of the elbow knee joint, the display assembly (4) comprises a pinion (42) connected with the speed reduction assembly (2) and a display wheel (41) for displaying a rotation angle, the display wheel (41) is connected with the pinion (42) through a driving wheel (43), an end cover (5) for protecting the speed reduction assembly (2) is arranged on the outer end face mask of the speed reduction assembly (2) and the outer end face mask of the display assembly (4), and a notch (53) for displaying the circumferential scale of the display wheel (41) is formed in the position of the end cover (5) corresponding to the display wheel (41);
the notch (53) is arranged on the end face of the end cover (5), and the size of the notch (53) is matched with the size of the scale; the scales are uniformly arranged on the circumferential surface of the display wheel (41), and the scale range of the scales is from-90 degrees to 90 degrees; the display wheel (41) is an annular gear and is rotatably connected with the end cover (5);
the locking assembly (3) comprises a ratchet wheel (31) fixedly connected with the speed reducing assembly (2) and a pawl (32) capable of preventing the ratchet wheel (31) from rotating, an end cover (5) for protecting the speed reducing assembly (2) is arranged on the outer end face of the speed reducing assembly (2), and an adjusting button for driving the pawl (32) to move is arranged on the end cover (5); the driving source is provided with a shell (6) for covering the driving source, one surface of the shell (6) contacting the end cover (5) is provided with an inclined plane groove (61), and the inclined plane groove (61) is inserted with an adjusting button to drive the adjusting button to move; a convex block (62) for inserting the end cover (5) is arranged on the contact surface of the shell (6) and the end cover (5), and a containing groove (51) is arranged at the position of the end cover (5) corresponding to the convex block (62); the shape of the protruding block (62) and the accommodating groove (51) is triangular, and the corners of the protruding block and the accommodating groove are subjected to chamfering treatment; the speed reduction assembly (2) comprises a power gear (21) connected with a power output end of a driving source and a sun gear (23) fixedly connected with a rear arm plate (11) or integrally arranged, wherein the power gear (21) penetrates through the end part of a front arm plate (12) and drives the front arm plate (12) to rotate through interference fit, one end of the power gear (21) is provided with a radial groove (211) for being matched with the power output end of the driving source to rotate, and the power output end is provided with a tenon capable of being in falcon connection with the radial groove (211); the sun gear (23) is an annular gear and is arranged at the end part of the rear arm plate (11), the rear arm plate (11) is made of metal materials, an accommodating cavity for accommodating the sun gear (23) is formed in the end part of the rear arm plate, and a sun gear is formed in the inner end surface of the accommodating cavity; the power gear (21) drives a planetary gear (22) to rotate on the sun gear (23), and the number of teeth of the planetary gear (22) is larger than that of the power gear (21) and smaller than that of the sun gear (23).
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