A portable resistance training device and method of use thereof

Abstract

The application discloses a portable resistance training device and a use method thereof, which comprises a training box, a fixing mechanism, two impedance units and a regulation mechanism. Each impedance unit comprises a tension belt and a winding mechanism. The winding mechanism is provided with a winding roller which is rotatably arranged. One end of the tension belt is wound on the winding roller, and the other end of the tension belt extends out of the training box. A magnetorheological medium and an elastic reset member are arranged between the winding roller and the training box. The regulation mechanism comprises a coil arranged in the circumferential direction of the winding roller, a power supply module and a control module. The magnetic field intensity through the magnetorheological medium is changed by adjusting the current of the coil, and then the shear resistance during the rotation of the winding roller is steplessly controlled, so that a constant training load is provided. The device can realize safe and controlled load in the centripetal contraction and centrifugal contraction stages, fundamentally eliminates the safety hazards of joint and soft tissue injury caused by the sudden change of the rebound force of the traditional elastic belt, and simultaneously has compact and light overall structure, and is convenient for bedside and home rehabilitation use.

Description

Technical Field

[0001] This invention relates to the field of training equipment technology, specifically to a portable resistance training device and its usage method. Background Technology

[0002] In clinical rehabilitation medicine, resistance training is a core method for restoring muscle strength, improving joint function, and preventing muscle atrophy. Especially for postoperative rehabilitation, nerve injury recovery, and elderly patients with sarcopenia, precise and safe load control is directly related to rehabilitation outcomes and patient safety.

[0003] Traditional resistance training equipment, such as dumbbells and barbells, while providing relatively stable gravitational loads, is bulky and heavy, making it inconvenient to carry and move, and difficult to deploy flexibly beside hospital beds or treatment beds. Furthermore, when using elastic resistance equipment such as resistance bands, the resistance value increases non-linearly with the stretching length during rehabilitation training, making it impossible to provide a constant training load throughout the entire range of motion of the joint. Additionally, rehabilitation patients generally have weaker muscles, resulting in significant rebound forces acting on the patient's limbs during the band's retraction phase. This can easily lead to passive strains of antagonistic muscle groups, impact injuries to joint capsules or ligaments, and even falls due to sudden traction, posing serious safety risks and thus requiring improvement. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a portable resistance training device and its usage method.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A portable resistance training device, comprising: The training box is equipped with a fixing mechanism for fixing to the outside world; Two impedance units are symmetrically arranged on the training box, and each impedance unit includes a tension band and a winding mechanism disposed inside the training box; On the take-up roller, the other end of the tension belt extends out of the training box and is used to withstand external tension. A magnetorheological medium is provided between the take-up roller and the training box. When the take-up roller rotates relative to the training box, it is subjected to the shear resistance of the magnetorheological medium. The winding mechanism further includes an elastic reset member, which is connected between the winding roller and the training box and is used to apply a rotational force to the winding roller; The training box is also equipped with a control mechanism, which includes a coil, a power supply module, and a control module. The coil is disposed around the circumference of the take-up roller, and the power supply module is electrically connected to the coil and used to supply power to the coil, so that the coil generates a magnetic field that passes through the magnetorheological medium; The control module is signal-connected to the power supply module and is used to adjust the current output from the power supply module to the coil according to external instructions, so as to change the magnetic field strength and thereby adjust the magnitude of the shear resistance experienced by the take-up roller when it rotates.

[0006] As a further improvement of the present invention, a fixed shaft is also provided inside the training box, the take-up roller is rotatably sleeved on the fixed shaft, and a sealed filling gap is formed between the inner wall of the take-up roller and the outer wall of the fixed shaft, and the magnetorheological medium is filled in the filling gap; a sealed bearing is provided between the inner wall of the take-up roller and the outer wall of the fixed shaft, and the filling gap is located between the two sealed bearings.

[0007] As a further improvement of the present invention, one end of the take-up roller is provided with an annular first mounting cavity, and a ring roller is provided in the training box corresponding to the first mounting cavity. The coil is installed on the surface of the ring roller and is inserted into the first mounting cavity along with the ring roller.

[0008] As a further improvement of the present invention, a second mounting cavity is provided at the other end of the take-up roller, and the elastic reset member is a spring housed in the second mounting cavity, with the training box and the take-up roller respectively fixed at both ends of the spring.

[0009] As a further improvement of the present invention, the training box is provided with a sensing mechanism, which includes a sensor and a sensing block disposed on the take-up roller. The sensing block moves with the take-up roller, and the sensor corresponds to the sensing block and receives signals.

[0010] As a further improvement of the present invention, the control mechanism further includes a communication module, which is signal-connected to the control module and is used to receive signals from an external terminal.

[0011] As a further improvement of the present invention, the fixing mechanism includes shoulder straps symmetrically arranged on the training box.

[0012] As a further improvement of the present invention, a mounting plate is provided extending outward from the top of the training box, and screw holes are provided on the mounting plate.

[0013] A method of using a portable resistance training device, comprising the aforementioned portable resistance training device, includes the following steps: S1: The training box is fixed to the external support body by the fixing mechanism, and the extension ends of the tension bands of the two impedance units are respectively connected to the user's limbs; S2: Receive external commands through the control module and set the target resistance value; S3: Pull the tension band to make the take-up roller rotate against the rotational force of the elastic reset member and the shear resistance of the magnetorheological medium, and perform concentric muscle contraction training; then, the take-up roller rotates under the action of the rotational force of the elastic reset member, and takes up the tension band to perform eccentric muscle contraction training. S4: During training, the control module adjusts the current output from the power supply module to the coil in real time according to the target resistance value, thereby changing the shear resistance of the magnetorheological medium and adjusting the training load. S5: After training, the power supply is stopped by the control module, the magnetorheological medium returns to a low viscosity state, and the winding roller automatically rotates under the action of the elastic reset member to completely wind up the tension belt into the training box.

[0014] The beneficial effects of this invention are: 1. By steplessly adjusting the shear resistance of the magnetorheological medium through the electromagnetic coil, a constant and controllable training load can be provided for the patient. At the same time, the adjustment method of the magnetorheological medium can avoid wear during the rotation of the take-up roller, thus ensuring load stability during long-term use. In addition, the device is lightweight and compact, and can be flexibly deployed at the bedside in the ward or treatment bedside. It also facilitates home rehabilitation training for patients after discharge, realizing a seamless connection between in-hospital and out-of-hospital rehabilitation.

[0015] 2. Through the coordinated action of the elastic reset element and the controllable magnetorheological shear resistance, a controlled load is provided during both the centripetal and centrifugal contraction phases. During the rotation of the take-up roller, the controllable shear resistance provided by the magnetorheological medium and the rotational force of the elastic reset element work together to achieve stable low-speed rotation. This effectively avoids safety risks such as antagonistic muscle strains, joint ligament injuries, and even patient falls due to rebound impact, greatly improving the safety of rehabilitation training. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall installation of the present invention; Figure 2 This is a schematic cross-sectional view of the training box of the present invention. Figure 3 This is a schematic cross-sectional view of the winding roller installation of the present invention; Figure 4 This is a schematic cross-sectional view of the magnetorheological medium installation of the present invention; Figure 5 This is a flowchart of the overall process of the method of the present invention.

[0017] Reference numerals: 1. Training box; 2. Tension belt; 3. Take-up roller; 4. Magnetorheological medium; 5. Elastic reset element; 6. Coil; 7. Power supply module; 8. Fixed shaft; 9. Filling gap; 10. Sealed bearing; 11. First mounting cavity; 12. Ring roller; 13. Second mounting cavity; 14. Induction block; 15. Sensor; 16. Communication module; 17. Shoulder strap; 18. Mounting plate; 19. Screw hole. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0019] See Figures 1 to 5 The present invention provides a portable resistance training device, which includes a training box 1, a fixing mechanism, two impedance units and a control mechanism.

[0020] Specifically, the training case 1 has an internal installation space. A fixing mechanism is provided on the training case 1 to secure the entire device to an external support or the user's body. In this embodiment, the fixing mechanism includes shoulder straps 17 symmetrically arranged on the training case 1, allowing the user to carry the training case 1 on their back. Simultaneously, a mounting plate 18 extends outward from the top of the training case 1, with multiple screw holes 19 on the mounting plate 18, allowing the device to be fixed to a wall, column, or other fixed object using bolts, thus making it suitable for use in various scenarios.

[0021] Two impedance units are symmetrically arranged on the left and right sides of the training box 1 to meet the needs of independent or synchronous training of both limbs. Each impedance unit includes a tension band 2 and a winding mechanism located inside the training box 1.

[0022] The resistance band 2 can be made of high-strength fabric or fiber, with one end wound around the winding mechanism and the other end extending from the opening on the side of the training box 1. The extended end can be connected to a handle, wrist strap, or foot strap to connect with the user's limbs.

[0023] Furthermore, the winding mechanism includes a winding roller 3, and a fixed shaft 8 is fixed inside the training box 1. The fixed shaft 8 can be fixed to the shell wall of the training box 1 or fixed by a bracket. The winding roller 3 is cylindrical and rotatably mounted on the fixed shaft 8, allowing the winding roller 3 to rotate freely around the axis of the fixed shaft 8. A surrounding filling gap 9 is formed between the inner wall of the winding roller 3 and the outer wall of the fixed shaft 8, and this filling gap 9 is filled with a magnetorheological medium 4. The magnetorheological medium 4 can be a magnetorheological fluid, magnetorheological grease, or other colloidal material with magnetorheological effects. To ensure the sealing of the filling gap 9, sealed bearings 10 are respectively provided between the inner wall of the winding roller 3 and the outer wall of the fixed shaft 8 at both ends of the axial direction of the filling gap 9. The two sealed bearings 10 serve both rotational support and prevent leakage of the magnetorheological medium 4. A tension band 2 is wound around the outer circumference of the winding roller 3.

[0024] The winding mechanism also includes an elastic reset member 5, which applies a rotational force to the winding roller 3. In this embodiment, the winding roller 3 has a first mounting cavity 11 and a second mounting cavity 13 formed at both ends, and the elastic reset member 5 is a spring housed in the second mounting cavity 13. The inner end of the spring is fixed to the fixed shaft 8 or the fixed part of the training box 1, and the outer end is fixed to the winding roller 3. When the tension band 2 is pulled out and the winding roller 3 rotates in the forward direction, the spring is wound up and stores energy; when the external tension decreases or disappears, the spring releases energy to drive the winding roller 3 to rotate, thereby automatically retracting the tension band 2.

[0025] Furthermore, in order to apply a controllable magnetic field to the magnetorheological medium 4, the control mechanism includes a coil 6, a power supply module 7, and a control module.

[0026] Specifically, the first mounting cavity 11 is an annular cavity coaxially arranged along the axis of the take-up roller 3. A ring roller 12 is fixedly installed inside the training box 1 at a position corresponding to the first mounting cavity 11; the ring roller 12 does not rotate with the take-up roller 3. A coil 6 is wound and installed on the surface of the ring roller 12, forming a multi-turn excitation coil 6. During assembly, the ring roller 12 and its coil 6 are inserted as a whole into the first mounting cavity 11. The coil 6 is electrically connected to the power supply module 7 via a wire.

[0027] The power supply module 7 is located inside the training box 1 and may include a battery and a power supply circuit. When the power supply module 7 outputs current to the coil 6, the magnetic field generated by the coil 6 passes through the wall of the take-up roller 3 and the fixed shaft 8 and acts on the magnetorheological medium 4. Under the action of the magnetic field, the magnetic particles in the magnetorheological medium 4 align into chains along the direction of the magnetic field lines, increasing their shear yield strength. As a result, when the take-up roller 3 rotates relative to the fixed shaft 8, the magnetorheological medium 4 generates a large shear resistance on the inner wall of the take-up roller 3. This shear resistance is converted into the pulling resistance of the tension belt 2 through the take-up roller 3.

[0028] The control module is signal-connected to the power supply module 7. The control module may include a microcontroller and its peripheral circuitry. The control module receives external commands and adjusts the current output from the power supply module 7 to the coil 6 according to the commands, thereby changing the magnetic field strength and realizing stepless continuous adjustment of the shear resistance, i.e., the training load.

[0029] To enhance intelligent control, the control mechanism also includes a communication module 16, which is connected to the control module via a signal connection. The communication module 16 can be a Bluetooth module, WiFi module, or similar device, used for wireless communication with external terminals such as smartphones and tablets. Users can set parameters such as target resistance value, number of training sets, and repetitions through an application on their mobile terminal. External commands are transmitted to the control module via the communication module 16.

[0030] To acquire motion parameters during training, a sensing mechanism is also provided inside the training box 1. This sensing mechanism includes a sensor 15 and a sensing block 14 mounted on the take-up roller 3. In this embodiment, the sensor 15 is a Hall sensor fixed inside the training box 1, and the sensing block 14 is a permanent magnet or magnetic ring mounted on the end face or outer periphery of the take-up roller 3. When the take-up roller 3 rotates, the sensing block 14 periodically approaches the sensor 15, which generates a corresponding pulse signal and sends it to the control module. Based on this, the control module can calculate parameters such as the rotational speed, number of rotations, tension length of the tension belt 2, and motion speed of the take-up roller 3, achieving real-time monitoring and feedback of training data.

[0031] This embodiment also provides a method for using a portable resistance training device, specifically including the following steps: Step S1: Wear the training box 1 on your back using the shoulder strap 17, or fix it to an external support such as a wall using the mounting plate 18. Connect the extended ends of the tension bands 2 of the two impedance units to the user's hands or feet respectively using handles or straps to complete the training preparation.

[0032] Step S2: Pair and connect to the communication module 16 via Bluetooth through an application on an external terminal such as a smartphone. Select or customize the target resistance value, training mode, etc. on the application, and receive and confirm external commands through the control module.

[0033] Step S3: Begin the training exercise. The user pulls the resistance band 2, which drives the winding roller 3 to rotate against the rotational force of the spring and the shear resistance of the magnetorheological medium 4. During the return stroke, the user actively controls a slow release, and the winding roller 3, under the action of the spring's rotational force, rotates to wind up the resistance band 2. At this time, the magnetorheological medium 4 still applies controlled resistance, and the muscles undergo eccentric contraction training. Throughout the entire process, a safe and controlled load can be obtained in both the concentric and eccentric phases, completely eliminating the risk of uncontrollable rebound associated with elastic resistance bands.

[0034] Step S4: During the training process, the control module dynamically adjusts the current output from the power supply module 7 to the coil 6 according to the set target resistance value and real-time feedback parameters such as speed, thereby changing the magnetic field strength and the shear resistance of the magnetorheological medium 4, so that the actual resistance conforms to the set target, realizing various training load modes such as constant force, incremental force, and speed adaptation.

[0035] Step S5: After training, the user issues a stop command via the terminal. The control module controls the power supply module 7 to stop supplying power to the coil 6, the magnetic field disappears, and the magnetorheological medium 4 returns to a low-viscosity free-flowing state, reducing shear resistance. At this time, the winding roller 3 rotates under the action of the spring, completely winding the tension belt 2 into the training box 1, restoring it to its initial carrying state.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A portable resistance training device, characterized in that, include: Training box (1), the training box (1) is provided with a fixing mechanism for fixing to the outside world; Two impedance units are symmetrically arranged on the training box (1), and each impedance unit includes a tension band (2) and a winding mechanism arranged in the training box (1); The winding mechanism includes a winding roller (3) rotatably disposed inside the training box (1), one end of the tension belt (2) is wound around the winding roller (3), and the other end of the tension belt (2) extends out of the training box (1) and is used to bear external tension. A magnetorheological medium (4) is disposed between the winding roller (3) and the training box (1). When the winding roller (3) rotates relative to the training box (1), it is subjected to the shear resistance of the magnetorheological medium (4). The winding mechanism further includes an elastic reset member (5), which is connected between the winding roller (3) and the training box (1) and is used to apply a rotational force to the winding roller (3); The training box (1) is also equipped with a control mechanism, which includes a coil (6), a power supply module (7) and a control module; The coil (6) is arranged around the winding roller (3), and the power supply module (7) is electrically connected to the coil (6) and used to supply power to the coil (6), so that the coil (6) generates a magnetic field that passes through the magnetorheological medium (4); The control module is signal-connected to the power supply module (7) and is used to adjust the current output from the power supply module (7) to the coil (6) according to external instructions, so as to change the magnetic field strength and thereby adjust the magnitude of the shear resistance experienced by the winding roller (3) when it rotates.

2. The portable resistance training device according to claim 1, characterized in that, The training box (1) is also provided with a fixed shaft (8), the take-up roller (3) is rotatably sleeved on the fixed shaft (8), and a sealed filling gap (9) is formed between the inner wall of the take-up roller (3) and the outer wall of the fixed shaft (8), and the magnetorheological medium (4) is filled in the filling gap (9); a sealed bearing (10) is provided between the inner wall of the take-up roller (3) and the outer wall of the fixed shaft (8), and the filling gap (9) is located between the two sealed bearings (10).

3. The portable resistance training device according to claim 1, characterized in that, The take-up roller (3) has an annular first mounting cavity (11) at one end. The training box (1) is provided with an annular roller (12) corresponding to the first mounting cavity (11). The coil (6) is installed on the surface of the annular roller (12) and is inserted into the first mounting cavity (11) along with the annular roller (12).

4. A portable resistance training device according to claim 3, characterized in that, The other end of the take-up roller (3) is provided with a second mounting cavity (13), and the elastic reset member (5) is a spring housed in the second mounting cavity (13). The two ends of the spring are respectively fixed to the training box (1) and the take-up roller (3).

5. A portable resistance training device according to claim 1, characterized in that, The training box (1) is equipped with a sensing mechanism, which includes a sensor (15) and a sensing block (14) disposed on the take-up roller (3). The sensing block (14) moves with the take-up roller. The sensor (15) corresponds to the sensing block (14) and receives signals.

6. A portable resistance training device according to claim 1, characterized in that, The control mechanism also includes a communication module (16), which is connected to the control module and is used to receive signals from external terminals.

7. A portable resistance training device according to claim 1, characterized in that, The fixing mechanism includes shoulder straps (17) symmetrically arranged on the training box (1).

8. A portable resistance training device according to claim 1, characterized in that, The training box (1) has an installation plate (18) extending outward from the top, and the installation plate (18) has screw holes (19).

9. A method of using a portable resistance training device, comprising the portable resistance training device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: The training box (1) is fixed to the external support body by the fixing mechanism, and the extension ends of the tension bands (2) of the two impedance units are respectively connected to the user's limbs; S2: Receive external commands through the control module and set the target resistance value; S3: Pull the tension band (2) to make the take-up roller (3) rotate against the rotational force of the elastic reset member (5) and the shear resistance of the magnetorheological medium (4) to perform muscle concentric contraction training; Subsequently, the winding roller (3) rotates under the rotational force of the elastic reset member (5) to wind up the tension band (2) and perform eccentric muscle contraction training. S4: During the training process, the control module adjusts the current output from the power supply module (7) to the coil (6) in real time according to the target resistance value, thereby changing the shear resistance of the magnetorheological medium (4) to adjust the training load; S5: After the training is completed, the power supply is stopped by the control module, the magnetorheological medium (4) returns to a low viscosity state, and the winding roller (3) automatically rotates under the action of the elastic reset member (5) to completely wind up the tension belt (2) into the training box (1).

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