Grip strength rehabilitation training device and operation method thereof

Abstract

The invention relates to the technical field of medical instruments, and discloses a grip strength rehabilitation training device and an operation method thereof in order to solve the problems that in an existing grip strength rehabilitation technology, no adaptive passive training scheme exists for a 0-level grip strength patient, and the resistance adjusting precision is low, the grip strength rehabilitation training device comprises a glove body, and five sets of finger training units are connected to the glove body; the finger training unit comprises a magnetic driving mechanism which is movably connected with the glove body and is electrically connected with a battery panel on the glove body; the finger adjusting mechanism is movably connected with the magnetic driving mechanism and arranged on the periphery of the finger in a sleeving mode. A magnetic coil is fixed on the inner side of a concave connecting frame of a magnetic driving rod, a magnetic sheet is arranged at the end, opposite to the magnetic coil, of a magnetic conduction transmission rod, the magnetic coil and the magnetic conduction transmission rod generate attraction force / repulsive force through current direction switching, the current intensity is adjusted through a battery panel to control the driving force, and complications such as hand swelling and joint stiffness in the early stage of grip rehabilitation are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a grip strength rehabilitation training device and its operating method. Background Technology

[0002] Cervical spinal cord injury, a common and serious clinical trauma, is often caused by accidents such as car crashes, falls from heights, and sports injuries. Such injuries frequently lead to neuromuscular dysfunction in the upper limbs, especially the hands, manifesting as decreased muscle strength, loss or severe weakening of grip strength. This causes patients to lose core daily living abilities such as voluntary grasping and picking up objects, severely impacting their ability to perform daily activities independently and causing a double blow to their physical and mental health. Therefore, grip strength rehabilitation has become one of the core needs for functional recovery in patients after cervical spinal cord injury.

[0003] To meet this need, various grip strength rehabilitation methods have emerged in existing clinical and home settings, but all have significant limitations. In the early stages of rehabilitation, "passive finger flexion and extension training" conducted to prevent joint contractures requires manual manipulation by a therapist, with each training session lasting only 20-30 minutes. The training effect is highly dependent on the therapist's experience and strength control, making it difficult to standardize operations and ensure consistency in training between different patients or at different stages of the same patient. In the middle stages of rehabilitation, commonly used active training methods such as "grip ball training" and "elastic band training" can only judge the force exertion based on the patient's subjective feeling, and cannot quantify grip strength and movement completion in real time. This can easily lead to muscle compensation due to improper force exertion, such as over-reliance on arm strength rather than the target muscles of the hand, which can actually affect rehabilitation efficiency. Traditional resistance training tools, such as fixed-weight grip strengtheners, have non-adjustable strength, which cannot adapt to the individual needs of patients with different degrees of injury. Excessive strength may cause joint damage, while insufficient strength will not achieve effective rehabilitation results.

[0004] The prior art, patent number CN111134935A, discloses a spring-type medical multifunctional restraint glove. Although this glove integrates restraint and grip strength training functions, and achieves hand training through a grip ball in the palm of the glove body and a grip strength training device (including finger training rods, tension springs, etc.) on the back of the hand, its core design goal still leans towards "restraint" and "basic training," and has obvious shortcomings: First, this device relies on tension springs to provide training resistance, and resistance adjustment is only achieved by changing the spring connection position, resulting in low adjustment precision. Furthermore, it cannot set different resistances for each finger individually, making it difficult to meet the personalized training needs of patients with cervical spinal cord injuries whose fingers have different degrees of injury. Firstly, the training mode is still limited to active resistance training and does not include passive training functions designed for patients with cervical spinal cord injury who have a grip strength of 0 in the early stages. This makes it impossible to address the prevention of complications such as early hand swelling and joint stiffness. Secondly, the glove's outer cover is an elliptical spherical structure, which can provide restraint and protection, but it restricts the flexible movement of the hand in daily life. This makes it impossible to achieve "integration of rehabilitation training and daily activities." Patients still need to remove the outer cover at specific times to perform daily activities, which fails to meet the rehabilitation requirement of "training without interfering with work and wearing without hindrance." This is significantly different from the full-cycle, scenario-based grip strength rehabilitation needs of patients with cervical spinal cord injury. Summary of the Invention

[0005] To address the core issues in existing cervical spinal cord injury grip strength rehabilitation techniques, such as the lack of suitable passive training programs for early-stage grade 0 grip strength patients, fragmented training modes requiring multiple devices, low resistance adjustment precision, and the inability to provide personalized adaptation for individual fingers, this invention aims to provide a grip strength rehabilitation training device and method. This device aims for full-cycle rehabilitation coverage and deep integration with daily scenarios. Through modular structural design and multi-mode training logic, it achieves full-stage adaptation from passive prevention of complications at grade 0 grip strength to strength / flexibility recovery, while also considering wearing comfort and ease of operation, thus solving the pain points of low patient training compliance and poor rehabilitation efficiency.

[0006] To address the issue that existing equipment cannot cover patients in the early stages of cervical spinal cord injury (grip strength grade 0), this invention equips each finger with an independent magnetic drive rod and a magnetic transmission rod on the back of the glove body. A solar panel powers the magnetic coil, and by switching the current direction, the magnetic field polarity is changed, causing the magnetic coil and the magnetic plate at the end of the magnetic transmission rod to generate attraction or repulsion. Then, a joint adjustment transmission component (multi-link structure) converts the electromagnetic force into finger flexion and extension movements. Simultaneously, a magnetic slider moves synchronously to balance air pressure, ensuring smooth and stable movements. This design avoids the lack of standardization in traditional manual techniques and allows for adjustment of the driving force by current intensity, adapting to the tolerance of different patients and effectively preventing early hand swelling and joint stiffness.

[0007] To address the issues of low resistance adjustment precision and inability to adapt to individual fingers in existing devices, this invention creates air channels corresponding to each finger inside the side wall of the glove body. The resistance connecting rod of the magnetic drive rod is designed as a hollow structure connected to the air channels, with a magnetic slider sliding inside. When the patient actively applies force, the finger drives the magnetic slider to slide within the resistance connecting rod, compressing or stretching the air inside the cavity. The air flows through the air channels, generating resistance. Simultaneously, a sliding resistance control plate is set on the surface of the glove body. By changing the coverage area of ​​the air inlet in the air channels, the resistance for single-finger training can be precisely adjusted (the smaller the air inlet, the greater the resistance). This design eliminates the need for traditional spring structures, allowing for more precise resistance adjustment, and each finger can be independently controlled, avoiding uneven training effects caused by slower recovery in some fingers.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: On one hand, a grip strength rehabilitation training device includes a glove body fitted around the periphery of the hand, wherein five sets of finger training units are connected to the glove body, and the finger training units include: A magnetic drive mechanism is movably connected to the glove body and electrically connected to the battery panel on the glove body. The finger adjustment mechanism is movably connected to the magnetic drive mechanism and is sleeved on the outer periphery of the finger. Through the magnetic attraction inside the magnetic drive mechanism, it drives the finger to extend or bend.

[0009] Furthermore, the device also includes: A grip ball is installed on the palm side of the glove body and is connected to the outside of the glove body through a connecting tube.

[0010] Furthermore, the magnetic drive mechanism includes: A magnetic drive rod is rotatably connected at both ends to the glove body and the finger adjustment mechanism, and a magnetic coil is provided on the end face. The magnetic coil is electrically connected to the battery panel. A magnetic transmission rod is slidably connected to the magnetic drive rod, and a magnetic sheet is provided on the end face opposite to the magnetic coil. The magnetic transmission rod is rotatably connected to the finger adjustment mechanism.

[0011] Furthermore, the magnetic drive rod includes: A concave connecting bracket is rotatably connected at one end to the finger adjustment mechanism, and the magnetic coil is disposed on the end face near the magnetic sheet; The resistance connecting rod is designed as a hollow structure, with one end connected to the concave connecting frame and the other end rotatably connected to the glove body, and communicating with the air channel opened inside the glove body; A magnetic slider is slidably disposed within the resistance connecting rod, and an opposite magnetic sheet with opposite polarity is disposed on the end face adjacent to the magnetic sheet.

[0012] Furthermore, a positioning component is provided on the outer wall of the resistance connecting rod to adjust the moving speed of the magnetic transmission rod under the magnetic attraction of the magnetic coil.

[0013] Furthermore, the positioning component includes: A through groove is formed on the side wall of the magnetic drive rod; A magnetic plate has one end rotatably connected to the inner wall of the through groove via a rotating shaft, and the other end is provided with a magnetic sheet with the same polarity as the magnetic sheet. Multiple spring clips are installed on the inner wall of the through groove to restrict or spring up the magnetic plate.

[0014] Furthermore, the glove body includes: A resistance control plate is slidably mounted on the glove body and is used to adjust the size of the air inlet of the air channel.

[0015] Furthermore, the finger adjustment mechanism includes: The joint adjustment transmission component is rotatably connected to the magnetic transmission rod and the concave connecting frame, respectively. The ring is rotatably connected to the joint adjustment transmission component and is adapted to fit the finger joint.

[0016] On the other hand, the operation methods of the grip strength rehabilitation training device include passive training, active training, and hand strength and flexibility training: During passive training, the magnetic drive mechanism is activated, which drives the finger adjustment mechanism to reciprocate, training the extension and flexion of the fingers. During active training, the finger adjustment mechanism is driven by hand strength to reciprocate, thereby training finger extension and flexion. During hand strength training, the grip ball is filled with liquid, and the hand strength drives the finger adjustment mechanism to reciprocate, gripping the grip ball; During flexibility training, the grip ball is filled with gas, and the hand strength drives the finger adjustment mechanism to reciprocate, allowing the user to grasp the grip ball.

[0017] The beneficial effects of this invention are: 1. In this invention, a magnetic coil is fixed inside the concave connecting frame of the magnetic drive rod, and a magnetic sheet is provided at the end of the magnetic transmission rod relative to the magnetic coil. The two generate attraction / repulsion force by switching the current direction (forward current generates attraction, reverse current generates repulsion). This mechanical structure does not rely on the manual operation of a rehabilitation therapist. The driving force can be controlled by precisely adjusting the current intensity through the battery panel, avoiding joint damage caused by uncontrolled force, and effectively preventing early complications such as hand swelling and joint stiffness in cervical spinal cord injury. 2. In this invention, the resistance connecting rod is designed as a hollow structure with a built-in magnetic slider that has the opposite polarity to the magnetic sheet. When it slides synchronously with the magnetic transmission rod, it can balance the air pressure inside the resistance connecting rod, avoid the sliding jam caused by the air pressure difference, ensure that the finger flexion and extension movements conform to the physiological trajectory, and improve the comfort of passive training. 3. In this invention, the inner and outer walls of the magnetic drive rod are provided with through slots, magnetic plates and spring pieces. When the magnetic drive rod slides to the position of the magnetic plate, the opposing magnetic pieces of the magnetic plate generate a repulsive force and extend out of the through slot to block excessive sliding. The spring piece assists the magnetic plate to reset. This mechanical limiting structure can prevent the magnetic drive rod from separating from the magnetic slider, extend the service life of the device, and ensure the continuity of training. 4. In this invention, the glove body has an air channel corresponding to a single finger, and the resistance connecting rod is hollow and connected to the air channel. When the patient actively exerts force to drive the magnetic slider to slide, air flows through the air channel to generate resistance. Compared with the traditional spring resistance (which can only be adjusted by replacing the spring), the resistance of this structure changes more linearly and can adapt to the patient's progressive rehabilitation needs from weak to strong force. 5. In this invention, each finger corresponds to an independent air channel and resistance control plate. By changing the coverage area of ​​the air inlet of the air channel by the resistance control plate, the training resistance of a single finger can be adjusted individually, avoiding the problem of strong fingers compensating for weak fingers due to slower recovery of some fingers, and ensuring that the training effect of each finger is balanced. 6. In the rehabilitation training device and method proposed in this invention, the switching between passive and active training is achieved by switching the power supply of the magnetic coil on and off; the switching between flexibility and strength training is achieved by filling the grip ball with gas / liquid. All modes share core components such as the glove body and magnetic drive mechanism, eliminating the need for disassembly and replacement of the structure, reducing the subsequent use and maintenance costs for patients, and reducing the total expenditure for patients, thus avoiding the economic burden brought about by traditional multi-device solutions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the palm side structure of the present invention; Figure 2 This is a schematic diagram of the back-side structure of the present invention; Figure 3 This is a schematic diagram of the single-finger structure of the present invention; Figure 4 This is a top view of the single-finger structure of the present invention; Figure 5 For the present invention Figure 4 Sectional view of AA in the middle; Figure 6 For the present invention Figure 5 Partial view of M in the middle; Figure 7 This is a schematic diagram of the unfolded structure of the finger adjustment mechanism of the present invention; Figure 8This is a schematic diagram of the retractable structure of the finger adjustment mechanism of the present invention; Figure 9 This is a top view of the unfolded structure of the finger adjustment mechanism of the present invention; Figure 10 For the present invention Figure 9 Cross-sectional view of the middle section (BB); Figure 11 For the present invention Figure 10 Partial view of N; Figure 12 This is a schematic diagram of the magnetic drive rod-magnetic transmission rod structure of the present invention; Figure 13 This is a schematic diagram of the magnetic drive rod structure of the present invention; Figure 14 For the present invention Figure 13 Partial view of O in the middle; Figure 15 This is a schematic diagram of the unfolded structure of the thumb finger adjustment mechanism of the present invention.

[0019] in: 100. Grip ball; 200. Solar panel; 1. Glove body; 101. Air passage; 102. Resistance control plate; 2. Magnetic drive rod; 201. Magnetic coil; 202. Concave connecting frame; 203. Resistance connecting rod; 204. Magnetic slider; 205. Through slot; 206. Magnetic plate; 207. Spring; 3. Magnetic transmission rod; 301. Magnetic sheet; 4. Finger ring; 5. Connecting tube; 6. Joint adjustment transmission component; 601. First connecting rod; 602. Angle connecting plate; 603. Second connecting rod; 604. Third connecting rod; 605. Finger connecting rod. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See attached document Figure 1-15The illustrated grip strength rehabilitation training device, in this embodiment, uses a glove body 1 as its core carrier and integrates a grip ball 100, a magnetic drive mechanism, a finger adjustment mechanism, a connecting tube 5, and a battery panel 200, forming an integrated structure of "wearable + multi-mode training". The battery panel 200 is detachably installed in the battery compartment in the middle of the back side of the glove body 1, providing power to the magnetic drive mechanism; the grip ball 100 is connected to the palm side of the glove body 1 via the connecting tube 5, used for flexibility and strength training; the magnetic drive mechanism is evenly distributed on the back side of the glove body 1 corresponding to the five fingers, with one end rotatably connected to the glove body 1 and the other end movably connected to the finger adjustment mechanism; the finger adjustment mechanism is fitted around the patient's fingers, transmitting the power of the magnetic drive mechanism to the fingers to achieve joint movement control.

[0022] In this embodiment, the glove body 1 is made of flexible and breathable fabric, conforming to the contour of the hand, and is divided into a palm side and a back side. Its core function is to support the various training components and to achieve resistance adjustment through an internal structure. The glove body 1 is provided with air channels 101 and resistance control plates 102. The air channels 101 are opened along the back edge of the glove body 1 corresponding to the five fingers, and are connected to the magnetic drive mechanism corresponding to each finger, forming an airflow path to provide air resistance for active training. The resistance control plate 102, corresponding to each air channel 101, is slidably disposed on the back surface of the glove body 1, covering the air inlet of the air channel 101. The resistance control plate 102 can slide along a groove opened on the surface of the glove body 1. By changing the coverage area with the air inlet, the size of the air inlet of the air channel 101 is adjusted—when the coverage area of ​​the sliding resistance control plate 102 increases, the air inlet becomes smaller, and the airflow resistance increases; conversely, the resistance decreases, thus adapting to the resistance needs of different patients during active training.

[0023] In this embodiment, the battery panel 200 uses a thin rechargeable lithium battery, which is detachably fixed in the battery compartment in the middle of the back of the glove body 1 via Velcro. Its output end is electrically connected to the magnetic drive mechanism corresponding to each finger via a wire, and the wire is equipped with an independent control switch, which can control the magnetic drive of a single finger individually to meet personalized training needs.

[0024] Specifically, the magnetic drive mechanism is the core of passive training for patients with level 0 grip strength. Each finger corresponds to a set of magnetic drive mechanisms, including a magnetic drive rod 2 and a magnetic transmission rod 3. The two slide together and generate power through electromagnetic induction to drive finger movement.

[0025] In this embodiment, the magnetic drive rod 2 is arranged along the length of the finger, with one end rotatably connected to the glove body 1 and the other end rotatably connected to the finger adjustment mechanism. Specifically, it includes a concave connecting frame 202, a resistance connecting rod 203, and a magnetic slider 204. The concave connecting frame 202 has a "U" shape, with its open end facing the fingertip, and its end is rotatably connected to the finger adjustment mechanism via a rotating shaft. A magnetic coil 201 is fixedly installed on the inner end face of the concave connecting frame 202 (the side closest to the magnetic transmission rod 3). The magnetic coil 201 is electrically connected to the battery panel 200 through a wire, and the magnetic field polarity can be switched by changing the direction of the current. The resistance connecting rod 203 is a hollow cylindrical structure. One end is fixedly connected to the concave connecting frame 202 (the side near the magnetic coil 201), and the end of the resistance connecting rod 203 near the concave connecting frame 202 is a closed end. The end away from the concave connecting frame 202 is rotatably connected to the back of the hand side of the glove body 1 through a ball joint, and this end is connected to the air channel 101 inside the glove body 1. A magnetic slider 204 is slidably arranged inside the cavity. The magnetic slider 204 is a cylindrical permanent magnet, and its outer wall is tightly fitted to the inner wall of the resistance connecting rod 203 (it can slide but does not leak air). An opposite magnetic sheet is provided on its end face near the magnetic transmission rod 3. The polarity of the opposite magnetic sheet is opposite to that of the magnetic sheet 301 of the magnetic transmission rod 3, ensuring that the two can attract each other through magnetic force to realize motion transmission.

[0026] It should be noted that, in order to prevent the magnetic coil 201 from generating a magnetic force on the magnetic sheet 301 while simultaneously generating a magnetic attraction force on the magnetic slider 204 on the adjacent end face, in this embodiment, the end of the magnetic slider 204 near the magnetic coil 201 is set as a non-magnetic insulator, and the other end opposite to it is set as a permanent magnet with the opposite magnetism to the magnetic transmission rod 3.

[0027] In this embodiment, to prevent relative offset or disengagement between the magnetic transmission rod 3 and the magnetic slider 204 during reciprocating finger movements, a positioning component is provided on the outer wall of the magnetic drive rod 2. The positioning component specifically includes a through groove 205, a magnetic plate 206, and a spring piece 207. The through groove 205 is located on the outer wall of the magnetic drive rod 2, extending along the length of the resistance connecting rod 203, providing installation space for the magnetic plate 206 and the spring piece 207. The magnetic plate 206 is a rectangular sheet-shaped permanent magnet, with one end rotatably connected to the inner wall of the through groove 205 via a rotating shaft, and the other end rotatable within the through groove 205 around the rotating shaft. The free end of the magnetic plate 206 is provided with a reverse magnetic piece with the same polarity as the magnetic piece 301, used to generate a repulsive force with the magnetic piece 301 to adjust the moving speed of the magnetic transmission rod 3 under the magnetic attraction of the magnetic coil 201. The spring piece 207 is an elastic metal piece, and two pieces are provided. They are symmetrically installed on both sides of the inner wall of the through groove 205. One end is fixed to the side wall of the through groove 205, and the other end is suspended in the through groove 205. It is used to limit the rotation angle of the magnetic plate 206 and assist it in returning to its original position.

[0028] Specifically, when the magnetic transmission rod 3 drives the magnetic sheet 301 closer to the concave connecting frame 202, the magnetic sheet 301 and the opposing magnetic sheet of the magnetic plate 206 generate a repulsive force, pushing the magnetic plate 206 to rotate around the axis to a vertical position. At this time, the free end of the magnetic plate 206 extends out of the through groove 205, preventing the magnetic transmission rod 3 from sliding excessively. When the magnetic transmission rod 3 continues to move in the same direction, it pushes the magnetic plate 206 to rotate into the through groove 205. At this time, the side of the magnetic plate 206 abuts against the spring piece 207 on the other side of the through groove 205 until the magnetic transmission rod 3 and the magnetic slider 204 slide past the positioning assembly simultaneously. By adjusting the moving speed of the magnetic transmission rod 3 under the magnetic attraction of the magnetic coil 201 through the positioning assembly, the magnetic transmission rod 3 can be effectively prevented from disengaging from the magnetic slider 204, improving the continuity of the device's use.

[0029] In this embodiment, the finger adjustment mechanism is used to precisely transmit the power of the magnetic drive mechanism to the fingers, adapting to the movement trajectory of different finger joints, and includes a joint adjustment transmission component 6 and a finger ring 4. The joint adjustment transmission component 6 is a multi-link assembly structure, including a first link 601, a corner connecting plate 602, a second link 603, a third link 604, and a finger link 605, with each component sequentially rotatably connected via a rotating shaft.

[0030] Specifically, one end of the first connecting rod 601 is rotatably connected to the end of the magnetic transmission rod 3, and the other end is rotatably connected to one end of the corner connecting plate 602; the other end of the corner connecting plate 602 is rotatably connected to one end of the second connecting rod 603, the third connecting rod 604, and the concave connecting frame 202, and the ends of the second connecting rod 603 and the concave connecting frame 202 are rotatably connected to the corner connecting plate 602 through the same rotating shaft; the other ends of the second connecting rod 603 and the third connecting rod 604 are rotatably connected to one end of the finger connecting rod 605; the other end of the finger connecting rod 605 is rotatably connected to the finger ring 4. The finger ring 4 is made of flexible silicone material, with anti-slip texture on the inner wall, and is adapted to the proximal and middle phalanges of the fingers (each finger corresponds to 2 finger rings 4, respectively fitted on the outside of the proximal and middle phalanges); the finger ring 4 is rotatably connected to the finger connecting rod 605, and can synchronously drive the finger joint movement with the movement of the joint adjustment transmission component 6, and the silicone material can adapt to different finger thicknesses, improving wearing comfort.

[0031] It should be noted that this multi-link structure can simulate the flexion and extension trajectory of finger joints, converting the linear reciprocating motion of the magnetic drive mechanism into the bending / extension motion of the fingers, ensuring that the motion conforms to the physiological structure of the fingers and avoiding joint damage.

[0032] In this embodiment, the connecting tube 5 is a flexible transparent tube, one end of which penetrates the palm side wall of the glove body 1 (sealed connection with the glove body 1), and the other end is connected to the interior of the grip ball 100. The connecting tube 5 is equipped with a one-way valve to prevent leakage of gas or liquid filled into the grip ball 100, and supports the filling of air or liquid (such as water) into the grip ball 100 through a syringe. The grip ball 100 is a sac-like structure made of elastic rubber material, which is flat and round in its natural state, and is located in the middle of the palm side of the glove body 1 (fitting against the palm). After the grip ball 100 is filled with different amounts of gas or liquid through the connecting tube 5, it can form training carriers of different volumes or weights—the volume is variable when inflated with air, which is used for flexibility training; the weight is variable when filled with liquid, which is used for strength training, and the grip ball 100 can be disassembled and replaced through the connecting tube 5 for easy cleaning.

[0033] Reference Figure 15 In some other embodiments, given the physiological structure of the thumb, which contains only the proximal phalanx, distal phalanx, and one interphalangeal joint, but no middle phalanx, and whose movement trajectory is mainly opposition and flexion-extension, which is significantly different from the structure of the three phalanges and two interphalangeal joints of the other four fingers, this device is designed with a special finger adjustment mechanism for the thumb. Its core feature is the absence of a finger ring 4 and a matching finger link 605. By simplifying the link structure and adaptability design, it ensures complete fit with the movement trajectory of the thumb joint.

[0034] This invention relates to a grip strength rehabilitation training device. The glove body 1 serves as the supporting foundation, and the battery panel 200 acts as the core power source. It integrates a magnetic drive mechanism, a finger adjustment mechanism, a grip ball 100, and an air channel 101, forming a complete working logic of power output, motion transmission, resistance adjustment, and training feedback. This device can meet the full-cycle training needs of cervical spinal cord injury patients, from grip strength level 0 to strength recovery. The specific working principle is described below in three training modes: ① Passive training is designed for patients with level 0 grip strength (who cannot actively move their fingers). The core power comes from the electromagnetic induction effect of the magnetic drive mechanism. The polarity of the magnetic field is switched by current control, thereby driving the fingers to complete flexion and extension movements. The specific principle and process are as follows: The battery panel 200 provides an adjustable current to the magnetic coil 201 corresponding to each finger. When the current passes through the magnetic coil 201, a magnetic field is generated according to the "right-hand screw rule", and the polarity of the magnetic field switches as the direction of the current changes. At the same time, the magnetic plate 301 at the end of the magnetic transmission rod 3 is arranged opposite to the magnetic coil 201. The two can generate electromagnetic attraction or electromagnetic repulsion due to the interaction of the magnetic fields. This force is the core power that drives the finger movement. When a positive current is input to the magnetic coil 201, the end of the magnetic coil 201 closest to the magnetic sheet 301 forms an "S pole," which generates an electromagnetic attraction with the "N pole" (fixed polarity) of the magnetic sheet 301. When a reverse current is input to the magnetic coil 201, the end of the magnetic coil 201 closest to the magnetic sheet 301 switches to an "N pole," generating an electromagnetic repulsion with the "N pole" of the magnetic sheet 301. The current intensity can be controlled by the adjustment button on the battery panel 200. The greater the current, the stronger the electromagnetic attraction / repulsion, and the greater the driving force for finger movement, which can be precisely adapted according to the patient's tolerance. After the electromagnetic force is generated, the linear reciprocating motion is converted into the flexion and extension motion of the finger through the coordinated transmission of the magnetic drive mechanism and the finger adjustment mechanism. The specific transmission path is as follows: (1) When the finger extension motion is transmitted, under the action of the positive current, the electromagnetic attraction of the magnetic coil 201 and the magnetic sheet 301 pulls the magnetic transmission rod 3 to slide towards the concave connecting frame 202; the sliding of the magnetic transmission rod 3 drives the first connecting rod 601 connected to its end to move synchronously, and the first connecting rod 601 pulls the corner connecting plate 602 to rotate around the axis; at the same time, when the corner connecting plate 602 rotates, the second connecting rod 603 and the third connecting rod 604 connected to its other end move synchronously. 04 Pull the finger ring 4 (fitted on the proximal / middle phalanx of the finger), the finger ring 4 adheres to the phalanx and drives the finger joint to extend, completing the extension action; (2) When the finger bending motion is transmitted, under the action of reverse current, the electromagnetic repulsion of the magnetic coil 201 and the magnetic sheet 301 pushes the magnetic transmission rod 3 to slide away from the concave connecting frame 202; the sliding of the magnetic transmission rod 3 pushes the first connecting rod 601 to move, the first connecting rod 601 pushes the corner connecting plate 602 to rotate in the opposite direction; at the same time, when the corner connecting plate 602 rotates in the opposite direction, the second connecting rod 603 and the third connecting rod 604 push the finger ring 4, the finger ring 4 drives the finger joint to bend, completing the bending action.

[0035] ②Active training is designed for patients whose fingers have regained basic extension and contraction abilities. The core logic is that the patient actively exerts force to drive the movement of the parts, using air resistance to achieve resistance training. The specific principle is as follows: Before active training, turn off the connection switch between the battery panel 200 and the magnetic coil 201. The electromagnetic attraction / repulsion disappears, and the power source of the device switches from electromagnetic drive to active force exerted by the patient's fingers. The patient drives the finger ring 4, which is fitted on the finger bone, to move by autonomously controlling the flexion and extension of the fingers. When the finger ring 4 actively flexes and extends, the joint adjustment transmission component 6 drives the magnetic transmission rod 3 and the magnetic slider 204 to slide within the hollow cavity of the resistance connecting rod 203. At this time, the sliding of the magnetic slider 204 will compress or stretch the air inside the resistance connecting rod 203, and the air needs to circulate through the air channel 101. The resistance control plate 102 can adjust the size of the air inlet of the air channel 101: when the resistance control plate 102 increases the coverage area of ​​the air inlet, the air inlet becomes smaller, the air flow resistance increases, and the force that the patient needs to overcome when flexing and extending the finger is greater; conversely, the air inlet becomes larger, the resistance decreases, and the resistance level can be flexibly adjusted according to the patient's strength recovery. Because there is no electromagnetic interference during active training, the patient's force can be directly transmitted to the magnetic slider 204 and the air channel through the finger adjustment mechanism. The patient can clearly perceive the magnitude of the force and the resistance feedback, avoiding the muscle compensation problem caused by "subjective judgment of force" in traditional training (such as over-reliance on arm strength), and ensuring that the training is accurately applied to the target muscles of the hand.

[0036] ③ Flexibility and strength training uses the Grip Ball 100 as the core training component. By changing the volume and weight of the Grip Ball 100, different training goals can be achieved. The specific principle is as follows: Air is introduced into the grip ball 100 through the connecting tube 5, and the amount of air can be freely controlled. The more air is introduced, the larger the volume of the grip ball 100 becomes, and the greater the range of finger opening and closing needs to be. The patient actively flexes and extends their fingers, and in conjunction with the finger adjustment mechanism, the fingers grasp and release the grip ball 100. The elastic deformation of the grip ball 100 can be fed back to the fingers, helping the patient to gradually expand the range of finger movement and improve joint flexibility. When liquid (such as water) is filled into the grip ball 100 through the connecting tube 5, the more liquid is filled, the heavier the grip ball 100 becomes, and the greater the gravitational load that the fingers need to overcome when gripping. When the patient grips the grip ball 100 after it has been filled with liquid, they need to actively contract the flexor muscles of the hand to counteract the gravity of the grip ball. At the same time, the finger adjustment mechanism can stabilize the force trajectory of the fingers, avoid force deviation, and ensure that the strength training is accurately applied to the flexor muscles of the hand, gradually increasing the grip strength value.

[0037] Specific application examples: A patient suffered a C5-C6 segment cervical spinal cord injury in a car accident, resulting in postoperative loss of grip strength in the right hand and weakened grip strength in the left hand, accompanied by mild swelling of the right hand fingers and limited metacarpophalangeal joint movement. Upon admission, initial assessment showed a right hand grip strength of grade 0 (unable to actively flex or extend fingers, with significant resistance at the metacarpophalangeal joints during passive movement), and a finger dexterity score of 1 (only able to perform slight passive movements). The left hand grip strength was grade 1 (able to actively and slightly bend fingers, but unable to grasp objects), and a finger dexterity score of 3 (able to perform simple opening and closing movements). The patient requires rehabilitation training using the grip strength rehabilitation training device of this invention to restore basic right-hand grip strength, improve left-hand grasping stability, and prevent right-hand joint contractures. Specific operating steps are as follows: ① Early stage of rehabilitation: mainly passive training Place the five fingers of the right hand (grip strength level 0) and the left hand (grip strength level 1) into the corresponding finger rings 4. The thumb is placed in only one special finger ring 4 (covering the middle part of the proximal phalanx), and the other four fingers are placed in two finger rings 4 (proximal and middle phalanges). The rings are fixed by the anti-slip texture on the inner wall of the finger rings 4 to ensure that the blood vessels at the fingertips are not compressed. The initial output current of the right-hand battery panel 200 was set to 0.3A. It was calibrated using the battery panel adjustment button before each training session and gradually increased to 0.5A based on patient feedback. Each finger was extended for 3 seconds, paused for 1 second, and bent for 3 seconds in a single cycle. Each set consisted of 10 cycles, and each training session covered all 5 fingers of the right hand. The training was conducted 3 times a day for 20 minutes each time (after breakfast, after lunch, and before bedtime). During the training, the patient could sit on the sofa with their right hand resting naturally on their thigh without any deliberate exertion. Electromagnetic drive was activated only for the left ring and little fingers (these two fingers have the weakest active movement), with a current intensity of 0.2A, 8 cycles per set, combined with the patient's active slight exertion, forming a synergistic training of passive assistance and active attempt; ② Mid-stage rehabilitation: Active training and flexibility training Turn off the right-hand electromagnetic drive (disconnect the battery panel from the magnetic coil 201), switch to active resistance training, slide the resistance control plate 102 on the palm side of the glove body 1, initially covering 50% of the air inlet of the air channel 101 (medium resistance), when the patient actively bends their fingers, the magnetic slider 204 slides within the resistance connecting rod 203 to generate air resistance, training the hand flexor muscles; add one flexibility training session daily: fill the grip ball 100 with 50ml of air (the grip ball is about 4cm in diameter) through the connecting tube 5, the patient actively grasps and releases the grip ball with their right hand, 15 times per set, 2 sets per day, disassemble the grip ball for cleaning after training; Turn off the left-hand electromagnetic drive, cover the air inlet of the air channel 101 with the left-hand resistance control plate 102 for 70% coverage, and strengthen active resistance training; take advantage of the transmission of the thumb single finger ring 4 to increase "palm-to-palm training" - when the patient grasps the grip ball 100 with the left hand, deliberately control the thumb to fold towards the palm, simulate the action of grasping chopsticks, 12 times per set, 2 sets per day. Patients wear the device while eating. The grip ball can be removed, but the glove body and adjustment mechanism are retained. The right hand assists in grasping the spoon, while the left hand independently grasps the bowl, allowing training to be synchronized with daily life. When reading, patients wear the device on their right hand to perform low-resistance active flexion and extension (air inlet covers 30%). Every 30 minutes of reading, patients train for 5 minutes to improve training compliance. ③ Late Rehabilitation: Strength Training and Comprehensive Application 100ml of water is filled into the grip ball 100 through the connecting tube 5. The patient alternately grasps the liquid-filled grip ball 100 with both hands, 20 times per set, 2 sets per day. When training the right hand, the resistance control plate 102 covers 60% of the air inlet and 80% of the left hand, specifically strengthening the weaker hand. A separate "weighted palm-on-palm training" is set up for the left thumb - 120ml of water is filled into the grip ball 100, and the patient deliberately uses the thumb, index finger, and middle finger to grasp it, simulating the action of twisting a bottle cap, 15 times per set, 2 sets per day. Patients can wear the device for daily activities such as wiping tables and folding clothes. The device's lightweight design does not affect the flexibility of movement, while maintaining the training effect through finger movements. When patients go shopping, they can wear the device and replace the 200 battery with a portable version (1000mAh capacity, 8-hour battery life). The right hand assists in carrying light items, while the left hand can independently grasp the shopping basket handle, enabling all-day rehabilitation training.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A grip strength rehabilitation training device, comprising a glove body (1) fitted around the periphery of the hand, wherein five sets of finger training units are connected to the glove body (1), characterized in that, The finger training unit includes: A magnetic drive mechanism is movably connected to the glove body (1) and electrically connected to the battery plate (200) on the glove body (1); The finger adjustment mechanism is movably connected to the magnetic drive mechanism and is sleeved on the outer periphery of the finger. Through the magnetic attraction inside the magnetic drive mechanism, it drives the finger to extend or bend.

2. The grip strength rehabilitation training device according to claim 1, characterized in that, Also includes: A grip ball (100) is installed on the palm side of the glove body (1) and is connected to the outside through a connecting tube (5) through the glove body (1).

3. The grip strength rehabilitation training device according to claim 2, characterized in that, The magnetic drive mechanism includes: The magnetic drive rod (2) is rotatably connected at both ends to the glove body (1) and the finger adjustment mechanism, and a magnetic coil (201) is provided on the end face. The magnetic coil (201) is electrically connected to the battery panel (200). The magnetic transmission rod (3) is slidably connected to the magnetic drive rod (2), and a magnetic sheet (301) is provided on the end face opposite to the magnetic coil (201). The magnetic transmission rod (3) is rotatably connected to the finger adjustment mechanism.

4. The grip strength rehabilitation training device according to claim 3, characterized in that, The magnetic drive rod (2) includes: A concave connecting bracket (202) is rotatably connected at its end to the finger adjustment mechanism, and the magnetic coil (201) is disposed on the end face near the magnetic sheet (301). The resistance connecting rod (203) is configured as a hollow structure, with one end connected to the concave connecting frame (202) and the other end rotatably connected to the glove body (1), and communicating with the air channel (101) opened inside the glove body (1); The magnetic slider (204) is slidably disposed within the resistance connecting rod (203), and the end face adjacent to the magnetic sheet (301) is provided with a magnetic sheet of opposite polarity.

5. The grip strength rehabilitation training device according to claim 4, characterized in that, The outer wall of the resistance connecting rod (203) is provided with a positioning component for adjusting the moving speed of the magnetic transmission rod (3) under the magnetic attraction of the magnetic coil (201).

6. The grip strength rehabilitation training device according to claim 5, characterized in that, The positioning component includes: A through groove (205) is formed on the side wall of the magnetic transmission rod (2); The magnetic plate (206) has one end rotatably connected to the inner wall of the through groove (205) via a rotating shaft, and the other end is provided with a reverse magnetic sheet with the same polarity as the magnetic sheet (301). Multiple spring clips (207) are installed on the inner wall of the through groove (205) to restrict or spring up the magnetic plate (206).

7. The grip strength rehabilitation training device according to claim 6, characterized in that, The glove body (1) includes: A resistance control plate (102) is slidably disposed on the glove body (1) for adjusting the size of the air inlet of the air channel (101).

8. The grip strength rehabilitation training device according to claim 7, characterized in that, The finger adjustment mechanism includes: The joint adjustment transmission component (6) is rotatably connected to the magnetic transmission rod (3) and the concave connecting frame (202), respectively; The ring (4) is rotatably connected to the joint adjustment transmission component (6) and is adapted to the finger joint.

9. The method of operating the grip strength rehabilitation training device as described in any one of claims 2 to 8, characterized in that, The operational methods include passive training, active training, and hand strength and dexterity training: During passive training, the magnetic drive mechanism is activated, which drives the finger adjustment mechanism to reciprocate, training the extension and flexion of the fingers. During active training, the finger adjustment mechanism is driven by hand strength to reciprocate, thereby training finger extension and flexion. During hand strength training, the grip ball is filled with liquid, and the hand strength drives the finger adjustment mechanism to reciprocate, gripping the grip ball; During flexibility training, the grip ball is filled with gas, and the hand strength drives the finger adjustment mechanism to reciprocate, allowing the user to grasp the grip ball.

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