Hemiplegic hand functional task trainer and manufacturing method thereof

Abstract

The invention discloses a functional task trainer for a hemiplegic hand and a manufacturing method of the functional task trainer for the hemiplegic hand, the residual function of the affected hand is utilized and strengthened, and the problems of an existing post-stroke power type hand function trainer are solved, the functional task trainer comprises a main body support, a first elastic piece, a connecting rod, a connecting belt, a finger plate and a second elastic piece; the main body bracket is provided with a palm part and a thumb part; the palm part is C-shaped, and two ends of the palm part form openings on palm sides; the first elastic pieces are arranged on the left side and the right side of the front portion of the body support respectively and comprise first connecting parts, first connecting rods, first torsional spring rings, second connecting rods, second torsional spring rings, third connecting rods, third torsional spring rings and second connecting parts which are sequentially connected. The first connecting parts are fixed on left and right sides of the main body bracket; the two ends of the connecting rod are fixed to the second torsional spring rings of the two first elastic pieces respectively. The connecting belt is wound on the two third connecting rods; the two ends of the finger plate are fixed to the two second connecting parts correspondingly. Two ends of the second elastic member are respectively connected to two sides of the opening.

Description

Technical Field

[0001] The present invention belongs to the technical field of rehabilitation assistive devices, and particularly relates to a hemiplegic hand functional task trainer and a manufacturing method thereof. Background Art

[0002] After experiencing stroke or other brain injuries, the brain has neuroplasticity, that is, the ability to self-repair. However, this neuroplasticity and repair process highly depend on functional task training, which has been proven to be the most effective rehabilitation treatment method. When stroke patients enter the late spastic stage, the basic motor functions of the proximal upper limb, such as the activities of the shoulder and elbow, will gradually recover. However, due to the continuous increase in muscle tension and the dominant role of the flexor muscles of the upper limb, the patient's thumb often shows a flexed and adducted state, while the other four fingers show a grasping state, resulting in the inability to freely open the fingers, which makes it difficult to perform functional task training. Currently, it has been proven to be the most effective method to help the bent fingers straighten or provide power through assistive devices so that patients can participate in functional task training.

[0003] In the current technical field, the hand assistive training devices for hemiplegic patients cover two categories: electronic devices and mechanical devices. Electronic devices include electric air pump pressurized finger active and passive rehabilitation trainers, while mechanical devices include finger extension power orthoses, such as "spider hand frame" and "power type finger extension orthosis". They help the patient's hand perform active or passive grasping and releasing actions by applying external forces, so as to achieve the function of grasping and moving objects. However, the electronic air pump pressurized hand function trainer is only limited to performing passive flexion and extension actions of the fingers, and its parameters such as force, amplitude, and rhythm are preset, and the patient does not need to participate with active consciousness, so it cannot effectively perform conscious control, muscle strength, and grasping and moving training; as for the existing mechanical finger extension power orthoses, they also expose functional deficiencies in practical applications. Although it has a good effect on the extension of the metacarpophalangeal joint, it is difficult to solve the problems of excessive flexion and adduction of the thumb and flexion of the interphalangeal joints of each finger caused by increased muscle tension. It is difficult for patients to achieve an ideal functional training effect when using it, and some orthoses are large in size, complex to wear, and difficult to adjust elasticity, resulting in low acceptance by patients.

[0004] In the related prior art, such as the "Multifunctional Hand Dynamic Orthosis" disclosed in Patent CN212015880U, a joint fixing buckle is installed at the finger joints of the glove, and 1-5 elastic brackets are movably installed on the surface of the glove, and the elastic brackets are connected to the joint fixing buckle. However, for patients in the spastic stage of stroke, their four fingers are in a grasping state and cannot be freely opened, making it difficult to use the orthosis of the above patent for treatment. The reasons are as follows: (1) It is difficult to insert the entire palm into the glove, and the four fingers except the thumb need to be inserted into the respective finger sheaths of the glove. (2) This patent sets an elastic bracket for each finger. The total elastic force of the four fingers is relatively large, making it difficult to train the four fingers simultaneously. Moreover, the elastic brackets protrude from the surface of the glove in a relatively large size, which is inconvenient to use. Summary of the Invention

[0005] The main object of the present invention is to provide a hemiplegic hand functional task trainer and its manufacturing method, which not only utilizes and strengthens the residual function of the affected hand, but also cleverly solves problems existing in other similar functional orthoses, such as inaccurate thumb opposition, incomplete palm opening, and insufficient finger extension. When the patient's hemiplegic hand performs functional task training, it can not only hold firmly, oppose accurately, but also release smoothly, and has the advantages of small volume, light weight, simple material selection, convenient wearing, strong subjective initiative of the patient, and high acceptance.

[0006] To achieve the above object, one solution of the present invention is: A hemiplegic hand functional task trainer includes a main body bracket, a first elastic member, a connecting rod, a connecting belt, a finger plate, and a second elastic member; the main body bracket is provided with a palm part for wrapping the thenar and hypothenar of the palm, and a thumb part integrally connected with the palm part for wrapping the thumb on the dorsal side; the palm part is in a C shape, with an opening formed between its two ends; the first elastic member is a multi-segment torsion spring structure, and one is provided on each of the left and right sides of the palm part, which includes a first connecting part, a first connecting rod, a first torsion spring coil, a second connecting rod, a second torsion spring coil, a third connecting rod, a third torsion spring coil, and a second connecting part connected in sequence; the first connecting part is fixed on the left and right sides of the palm part; the first torsion spring coil, the second torsion spring coil, and the third torsion spring coil all provide resistance for finger bending and power for assisting finger extension during training; both ends of the connecting rod are respectively fixed on the second torsion spring coils of the two first elastic members for supporting the roots of the four fingers of the patient on the palmar side to assist the metacarpophalangeal joints to straighten; the connecting belt is wound around the third connecting rods of the two first elastic members for pressing the back of the four fingers; both ends of the finger plate are respectively fixed on the second connecting parts of the two first elastic members for supporting the ends of the four fingers of the patient; both ends of the second elastic member are respectively connected to both sides of the opening of the main body bracket.

[0007] The main body bracket, the connecting rod, and the finger plate are all made of thermoplastic materials.

[0008] Preferably, the thermoplastic material is one of a low-temperature thermoplastic plate, a polycaprolactone-based material, a modified polyurethane composite material, polyethylene, and a polypropylene-based material.

[0009] The functional task trainer for hemiplegic hand also includes a thumb strap, one end of which is connected to the back of the thumb, and the other end of which surrounds the thumb and is then connected to the back of the thumb.

[0010] Preferably, the end of the thumb strap is detachably connected to the thumb portion via a hook and a fleece surface of the Velcro.

[0011] The hemiplegic hand functional task trainer also includes a decompression pad arranged on the inner wall of the thumb portion.

[0012] The ends of the finger plates are flush with the roots of the nails of the 2nd to 5th fingers of the human palm respectively.

[0013] The first connecting part is fixed to the main body bracket by means of a screw and a nut; the screw passes through the inner wall of the main body bracket, passes through the first connecting part, and is then threadedly connected to the nut; the second elastic member is a rubber band, one end of which is fixed to the thenar side of the palm of the main body bracket, and the other end is sleeved on the nut on the hypothenar side of the palm of the main body bracket.

[0014] The finger plate is coated with anti-slip glue.

[0015] The second solution of the present invention is: A method for manufacturing a hemiplegic hand functional task trainer comprises the following steps: Step 1. Draw the outline of the affected hand and accurately mark the palmar wrist crease, palm crease, palmar finger crease, inter-finger crease, and nail root position on the drawing; Step 2. According to the outline of step 1, a low-temperature thermoplastic plate of corresponding size is cut, and a C-shaped ring is molded on the affected hand according to the low-temperature thermoplastic plate manufacturing technology to form the palm portion, and the thumb portion is integrally molded on the back of the thumb; the outer sides of the palm portion and the thumb portion are connected by the second elastic member; Step 3. Select a steel wire with an appropriate wire diameter according to the flexor muscle strength and muscle tension; wind two first elastic members according to the positions of the palmar creases and finger creases marked in the contour diagram; Step 4. Make the secondary bracket Step 4-1. Cut the low-temperature thermoplastic board strips, soften them and roll them into rods, trim the rods according to the width of the palm, pass through the second torsion spring coils of the two first elastic members and fix them separately to form a connecting rod 3; Step 4-2. Cut the low-temperature thermoplastic plate to make the finger plate 5 according to the horizontal lines marked on the distal interphalanges of the 2nd to 5th fingers, and fix its ends to the second connecting portions of the two first elastic members; Step 4-3. Cut self-adhesive magic tape with a width of 1.0 cm, fold it back and bond it at the proximal interphalangeal joint on the dorsal side of the finger, and connect and tie the two first elastic members to both sides of the four fingers, and the sub-bracket assembly is completed; Step 5. Assemble the trainer Referring to the position of the palmar crease, make dots and drill holes at the midpoints of the vertical surfaces on both sides of the main bracket, then fix the first connecting parts of the two first elastic members of the sub-bracket on the main bracket with screws, and adjust the lifting angle of the first elastic member, and the whole hemiplegic hand functional task trainer is made.

[0016] After adopting the above technical solution, the present invention has the following technical effects: When the present invention is in use, insert the patient's palm into the main bracket, the dorsal side of the palm and the thenar and hypothenar parts are covered by the palm part, the thumb is fixed in the opposition position on the thumb part, and the four fingers except the thumb pass through between the connecting rod and the connecting belt, and the finger pulp is attached to the finger board, then the functional task training can be started. The structure is simple and it is convenient to wear; relying on the elastic force provided by the first elastic member and the second elastic member, the patient can train the simultaneous straightening and bending of the four fingers respectively, and cooperate with the thumb fixed in the opposition position to complete the grasping and releasing actions of the affected hand. The present invention not only utilizes and strengthens the residual function of the affected hand, but also cleverly solves the problems such as inaccurate thumb opposition and insufficient palm opening existing in other similar functional orthoses, enabling the hemiplegic hand of the patient to be able to hold, oppose accurately, and release when performing functional task training, and having the advantages of small volume, light weight, simple material selection, convenient wearing, strong subjective initiative of the patient, and high acceptance. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a specific embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the first elastic member of a specific embodiment of the present invention.

[0019] Explanation of the reference numerals in the drawings: 1 - main bracket; 11 - palm part; 12 - thumb part; 13 - opening; 2 - first elastic member; 21 - first connecting part; 22 - first connecting rod; 23 - first torsion spring coil; 24 - second connecting rod; 25 - second torsion spring coil; 26 - third connecting rod; 27 - third torsion spring coil; 28 - second connecting part; 3 - connecting rod; 4 - connecting belt; 5 - finger board; 6 - second elastic member; 7 - thumb strap; 8 - decompression pad; 9 - screw; 10 - nut. Detailed Embodiment

[0020] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0021] Refer toFigure 1-2 As shown in the figure, the present invention discloses a functional task trainer for hemiplegic hands, which includes a main body bracket 1, a first elastic member 2, a connecting rod 3, a connecting belt 4, a finger plate 5 and a second elastic member 6; The main body bracket 1 is provided with a palm part 11 for wrapping the thenar and hypothenar of the palm, and a thumb part 12 integrally connected with the palm part 11 for wrapping the thumb on the dorsal side; the palm part 11 is in a C shape, and an opening 13 is formed between its two ends; The first elastic member 2 is a multi-segment torsion spring structure, and one is provided on each of the left and right sides of the palm part 11. It includes a first connecting part 21, a first connecting rod 22, a first torsion spring coil 23, a second connecting rod 24, a second torsion spring coil 25, a third connecting rod 26, a third torsion spring coil 27 and a second connecting part 28 connected in sequence; the first connecting part 21 is fixed at the midpoint of the vertical surfaces on the left and right sides of the palm part 11; the first torsion spring coil 23, the second torsion spring coil 25 and the third torsion spring coil 27 all provide resistance for finger bending and power for assisting finger extension during training; Both ends of the connecting rod 3 are fixed on the second torsion spring coils 25 of the two first elastic members 2, and are used to support the roots of the four fingers of the patient on the palmar side to assist the metacarpophalangeal joints to straighten; The connecting belt 4 is wound around the third connecting rods 26 of the two first elastic members 2 and is used to press the back of the four fingers; Both ends of the finger plate 5 are fixed on the second connecting parts 28 of the two first elastic members 2 and are used to support the ends of the four fingers of the patient; Both ends of the second elastic member 6 are respectively connected to both sides of the opening 13 of the main body bracket 1.

[0022] Through the above scheme, when the present invention is used, the patient's palm is inserted into the main body bracket 1, the dorsal side of the palm and the thenar and hypothenar are covered by the palm part 11, the thumb is fixed in the opposition position on the thumb part 12, and the four fingers except the thumb pass through between the connecting rod 3 and the connecting belt 4, and the finger pads are attached to the finger plate 5, then the functional task training can be started. The structure is simple and it is convenient to wear; relying on the elastic force provided by the first elastic member 2 and the second elastic member 6, the patient can train the simultaneous straightening and bending of the four fingers respectively, and cooperate with the thumb fixed in the opposition position to complete the grasping and releasing actions of the affected hand. It is especially suitable for patients with finger flexor muscle strength (MMT muscle strength assessment) above grade 2 and muscle tone (modified Ashworth assessment) below grade 3 after stroke. The present invention not only utilizes and strengthens the residual function of the affected hand, but also cleverly solves problems such as inaccurate thumb opposition and insufficient palm opening existing in other similar functional orthoses, enabling the hemiplegic hand of the patient to be able to grip, oppose accurately and release during functional task training, and having the advantages of small size, light weight, simple material selection, convenient wearing, strong subjective initiative of the patient and high acceptance.

[0023] The following shows specific embodiments of the above hemiplegic hand functional task trainer.

[0024] The above-mentioned main body bracket 1, connecting rod 3 and finger plate 5 are all made of thermoplastic materials, so that these components can be shaped to match the patient's palm during manufacturing, and fit more closely to the patient's palm surface to achieve support.

[0025] Furthermore, the above thermoplastic materials include low-temperature thermoplastic plates, as well as polycaprolactone (PCL)-based materials, modified polyurethane composite materials, polyethylene (PE) and polypropylene (PP)-based materials, etc. Among them, the low-temperature thermoplastic plate is a special synthetic high-molecular polyester, a new type of medical material processed by a series of physical and chemical methods, and is used as the manufacturing material for orthopedic external fixation and orthoses (braces). Due to the outstanding properties of this material, such as not absorbing rays, having good shaping effect after heating and softening, and its unique shape memory function (when the shaping is not satisfactory, it can be reheated, reshaped or locally reheated and reshaped again), as well as simple operation and convenient fixation, it is the most ideal medical material.

[0026] The present invention also includes a thumb strap 7. One end of the thumb strap 7 is connected to the back of the thumb part 12, and the other end surrounds the thumb part 12 for one circle and then is connected to the back of the thumb part 12. In this embodiment, the end of the above thumb strap 7 and the thumb part 12 are detachably connected through the shot hook and the fuzzy surface of the magic tape, which is convenient for adjusting the tightening degree and position of the thumb strap 7.

[0027] The present invention also includes a decompression pad 8 provided on the inner wall of the thumb part 12.

[0028] The distal ends of the above finger plates 5 are flush with the nail roots of the second to fifth fingers of the human palm respectively.

[0029] The above first connecting portion 21 is fixed on the main body bracket 1 by means of cooperation of a screw 9 and a nut 10; the screw 9 passes through the inner wall of the main body bracket 1, passes through the first connecting portion 21, and is then threadedly connected to the nut 10.

[0030] Furthermore, the above second elastic member 6 is a rubber band. One end of the rubber band is fixed on the thenar side of the palm part 11 of the main body bracket, and the other end is sleeved on the nut 10 on the hypothenar side of the palm part 11 of the main body bracket, so as to provide resistance and resilience when the patient spreads the thumb.

[0031] The above connecting belt 4 can be made of an elastic material or a strip-shaped magic tape, so as to facilitate wearing the brace and adjusting the position and tightness.

[0032] The above finger plates 5 are coated with anti-slip glue.

[0033] In addition, the present invention also discloses a manufacturing method of the hemiplegic hand functional task trainer. First, when manufacturing the hemiplegic hand functional task trainer, it is necessary to screen suitable patients through evaluation. Generally speaking, the evaluation criteria are as follows: ① The patient has the awareness of active grasping. ② The affected hand can make a grasping motion, or the closing function of the affected hand has been restored and can grasp an object. ③ The grip strength of the affected hand can resist the spring resistance: the flexor muscle strength (MMT muscle strength assessment) is above grade 2. ④ The opening of the affected hand is restricted: due to increased muscle tone, the affected hand cannot be opened voluntarily after being clenched, and the muscle tone (modified Ashworth assessment) is graded below grade 3; or there is no increase in muscle tone, but the extensor muscle strength is lost.

[0034] After the patient is selected, the trainer is manufactured according to the following steps: Step 1. Draw the contour map of the affected hand, and accurately mark the palmar wrist crease, palm crease, metacarpophalangeal crease, interphalangeal creases of each finger, and the position of the nail root on the drawing, which serves as the specification reference standard for the main body bracket 1 and the first elastic member 2.

[0035] Step 2. Manufacture the main body bracket 1 According to the contour map in Step 1, cut a 2.4 mm low-temperature thermoplastic sheet of appropriate size, and form a C-shaped ring on the affected hand according to the low-temperature thermoplastic sheet manufacturing technology to form the palm part 11, and at the same time integrally form the thumb part 12 on the dorsal side of the thumb; when shaping, it is necessary to ensure that the thumb web is moderately opened, and the fixed thumb pulp can pinch with the pulps of the extended and flexed index and middle fingers; the outer sides of the palm part 11 and the thumb part 12 are connected by the second elastic member 6. Specifically, the head and tail ends of the C-shaped ring are connected by a rubber band, one end of the rubber band is fixed, and the other end is hooked to the opposite end, so that the head and tail ends of the C-shaped ring hook the thenar and hypothenar parts of the palm, ensuring that the thumb is in the opposition position, has a certain degree of mobility and is easy to wear.

[0036] Step 3. Wind the first elastic member 2 According to the flexor muscle strength and muscle tone, select a steel wire with an appropriate wire diameter, usually 1 mm thick 316 stainless steel wire (corrosion-resistant), and wind two first elastic members 2 according to the positions of the palm crease and finger creases marked on the drawing; the elasticity of the first elastic member 2 can be individually adjusted by the thickness of the steel wire, the diameter of the spring ring, the number of turns, the pitch angle, etc.

[0037] Step 4. Manufacture the auxiliary bracket Step 4-1. Cut the low-temperature thermoplastic sheet into strips, soften them and roll them into rod-shaped strips, trim the rod-shaped strips according to the width of the palm, pass through the second torsion spring ring 25 of the two first elastic members 2 and fix them respectively to make the connecting rod 3; the connecting rod 3 is located at the finger root crease on the palmar side of the finger, and its function is to connect and stabilize the spring bracket and assist in extending the metacarpophalangeal joint; Step 4-2. Draw a diagram according to the marked points on the distal interphalangeal transverse creases of the second to fifth fingers, and cut an arcuate (or wedge-shaped) low-temperature thermoplastic finger half-finger plate. The width of the plate strip is wider on the index finger side and narrower on the little finger side. After the plate strip is softened, it is fixed in a grooved shape on the second connecting parts 28 of the two first elastic members 2 by using the self-adhesion of the plate material. The finger half-finger plate is located on the proximal half of the finger pads of the four fingers and straddles the distal interphalangeal joints of each finger. Its function is to connect the spring brackets, correct the flexion of the distal interphalangeal joints, and assist in extending the fingers. The purpose of exposing the ends of the finger pads is to make the grasping more sensitive to sensory input; Step 4-3. Cut a self-adhesive magic tape with a width of 1.0 cm, fold it back and bond it at the proximal interphalangeal joint on the dorsal side of the finger, and connect and tie the two first elastic members 2 to both sides of the four fingers, and the sub-bracket assembly is completed. The function of the connecting belt 4 is to correct the flexion of the interphalangeal joints when the fingers are opened. The use of self-adhesive magic tape as the connecting belt 4 is to make the bracket easier to wear.

[0038] Step 5. Assemble the trainer With reference to the position of the palmar transverse crease, make dots at the midpoints of the vertical surfaces on both sides of the main bracket 1 and then drill holes. Then, fix the first connecting parts 21 of the two first elastic members 2 of the sub-bracket on the main bracket 1 with screws, and adjust the lift angle of the first elastic member 2. Thus, the entire hemiplegic hand functional task trainer is made.

[0039] When in use, put the assembled trainer on the affected hand of the patient, adjust the position of the C-shaped ring and hang the rubber band, and then fix the thumb to the dorsal restraint plate with magic tape; then, with the position of the main bracket 1 as a reference, finely adjust the size of the first elastic member 2 to make the entire bracket more suitable for the hand; then let the patient perform the grasping action, and observe the closing and opening of the fingers, the correction effect of the interphalangeal joints, the accuracy of thumb opposition, and the use safety such as whether there is local compression.

[0040] According to the fitting situation, the problems of the bracket can be further adjusted. Then, apply anti-slip glue to the finger plate 5 and screws of the sub-bracket. After the anti-slip glue dries, deliver the trainer to the patient, and at the same time give guidance on wearing and training.

[0041] Compared with factory production, it can be realized that the doctor directly makes on-site customized products according to the patient's situation in the hospital. It is not only comfortable to wear but also can produce the trainer that best suits the patient's disease course, which is more conducive to the recovery of the patient's condition.

[0042] The hemiplegic hand functional task trainer can be dynamically or statically connected to a wrist orthosis to be transformed into a wrist, hand, and finger orthosis, which is suitable for patients with wrist dorsiflexion limitation caused by spasm. In addition, after evaluation and modification, the trainer can also be extended to apply to patients with finger extension function limitation and normal finger flexion caused by traumatic brain injury, spinal cord injury, and nerve and tendon lesions.

[0043] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A functional task trainer for hemiplegic hand, characterized in that: It includes a main frame, a first elastic member, a connecting rod, a connecting belt, a finger plate and a second elastic member; The main frame is provided with a palm portion for wrapping the thenar and hypothenar parts of the palm, and a thumb portion integrally connected to the palm portion and for wrapping the thumb on the back side; the palm portion is C-shaped, with an opening formed between its two ends; The first elastic member is a multi-section torsion spring structure, and one is arranged on each of the left and right sides of the palm, and comprises a first connecting part, a first connecting rod, a first torsion spring coil, a second connecting rod, a second torsion spring coil, a third connecting rod, a third torsion spring coil and a second connecting part connected in sequence; the first connecting part is fixed on the left and right sides of the palm; the first torsion spring coil, the second torsion spring coil and the third torsion spring coil all provide resistance to finger bending and power to assist finger extension during training; The two ends of the connecting rod are respectively fixed to the second torsion spring coils of the two first elastic members, and are used to support the bases of the patient's four fingers on the palm side to assist in straightening the metacarpophalangeal joints; The connecting belt is wound around the third connecting rods of the two first elastic members and is used to press the backs of the four fingers; The two ends of the finger plate are respectively fixed to the second connecting parts of the two first elastic members, and are used to support the ends of the patient's four fingers; Two ends of the second elastic member are respectively connected to two sides of the opening of the main frame.

2. The hemiplegic hand functional task trainer according to claim 1, characterized in that: The main body bracket, the connecting rod and the finger plate are all made of thermoplastic material.

3. The hemiplegic hand functional task trainer according to claim 2, characterized in that: The thermoplastic material is one of a low temperature thermoplastic plate, a polycaprolactone-based material, a modified polyurethane composite material, a polyethylene-based material and a polypropylene-based material.

4. The hemiplegic hand functional task trainer according to claim 1, characterized in that: It also includes a thumb strap, one end of which is connected to the back of the thumb, and the other end of which wraps around the thumb and is then connected to the back of the thumb.

5. The hemiplegic hand functional task trainer according to claim 4, characterized in that: The end of the thumb strap is detachably connected to the thumb portion through the ejected hook and the fleece surface of the Velcro.

6. The hemiplegic hand functional task trainer according to claim 1, characterized in that: Also included is a pressure relief pad disposed on the inner wall of the thumb portion.

7. The hemiplegic hand functional task trainer according to claim 1, characterized in that: The distal ends of the finger plates are flush with the roots of the nails of the second to fifth fingers of the human palm.

8. The hemiplegic hand functional task trainer according to claim 1, characterized in that: The first connecting part is fixed to the main body bracket by means of a screw and a nut; the screw passes through the inner wall of the main body bracket, passes through the first connecting part, and is then threadedly connected to the nut; the second elastic member is a rubber band, one end of which is fixed to the thenar side of the palm of the main body bracket, and the other end is sleeved on the nut on the hypothenar side of the palm of the main body bracket.

9. The hemiplegic hand functional task trainer according to claim 1, characterized in that: The finger plate is coated with anti-slip glue.

10. A method for manufacturing the hemiplegic hand functional task trainer according to claim 1, characterized in that The following steps are involved: Step 1. Draw the outline of the affected hand and accurately mark the palmar wrist crease, palm crease, palmar finger crease, inter-finger crease, and nail root position on the drawing; Step 2. According to the outline of step 1, a low-temperature thermoplastic plate of corresponding size is cut, and a C-shaped ring is molded on the affected hand according to the low-temperature thermoplastic plate manufacturing technology to form the palm portion, and the thumb portion is integrally molded on the back of the thumb; the outer sides of the palm portion and the thumb portion are connected by the second elastic member; Step 3. Select a steel wire with an appropriate wire diameter according to the flexor muscle strength and muscle tension; wind two first elastic members according to the positions of the palmar creases and finger creases marked in the contour diagram; Step 4. Make the secondary bracket Step 4-1. Cut the low-temperature thermoplastic board strips, soften them and roll them into rods, trim the rods according to the width of the palm, pass through the second torsion spring coils of the two first elastic members and fix them separately to form a connecting rod 3; Step 4-2. Cut the low-temperature thermoplastic plate to make the finger plate 5 according to the horizontal lines marked on the distal interphalanges of the 2nd to 5th fingers, and fix its ends to the second connecting portions of the two first elastic members; Step 4-3. Cut a 1.0 cm wide piece of self-adhesive Velcro, fold it back and glue it at the proximal interphalangeal joint on the back of the finger, connect and tie the two first elastic members to the two sides of the four fingers, and the secondary bracket is assembled; Step 5. Trainer Assembly With reference to the position of the transverse palm lines, dots are marked on the midpoints of the vertical surfaces on both sides of the main support and holes are drilled. Then, the first connecting parts of the two first elastic parts of the auxiliary support are fixed to the main support with screws. The lifting angle of the first elastic part is adjusted, and the entire hemiplegic hand functional task trainer is completed.

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