A portable home-use pelvic floor magnetic therapy device

Abstract

This utility model relates to a portable home-use pelvic floor magnetic therapy device, comprising a handle with a magnetic therapy coil inside. The magnetic therapy coil has a control circuit, which includes a current module, a rectifier circuit, an LLC resonant circuit, a drive circuit, and a controller. The output of the rectifier circuit is connected to the LLC resonant circuit, which is connected to the drive circuit. The output of the LLC resonant circuit is connected to a thyristor circuit, which is connected to the magnetic therapy coil to form a circuit. The drive circuit includes a multivibrator and a full-bridge drive circuit. The control terminal of the multivibrator is connected to the controller, and the output of the multivibrator is connected to the full-bridge drive circuit. The output of the full-bridge drive circuit is connected to the LLC resonant circuit. The input of the controller is also connected to a comparator circuit. The embedded design of the circuitry in this utility model reduces the device's size, and the housing solves the problem of inconvenience in carrying and using pelvic floor magnetic therapy devices.

Description

Technical Field

[0001] This utility model relates to the field of pelvic floor medical technology, specifically to a portable home-use pelvic floor magnetic therapy device. Background Technology

[0002] Urinary incontinence, chronic pelvic pain, difficulty urinating after pelvic surgery; lower urinary tract dysfunction, bowel dysfunction, sexual dysfunction, erectile dysfunction, etc., are a series of common pelvic floor disorders affecting a large population and significantly impacting people's daily lives and work. Pelvic floor magnetic stimulation (PMS) employs a non-invasive treatment method, using a high-intensity magnetic field to penetrate human tissue and directly act on the pelvic floor muscles and nerves. It stimulates the muscle-nerve junctions, activates motor units, improves muscle strength, inhibits abnormally excited nerve signals, relaxes overly tense muscles, and simultaneously activates multiple muscle groups to restore the overall coordination of pelvic floor muscle contraction and relaxation. Compared to other therapies, this method avoids the pain and discomfort that may accompany electrical stimulation of the pelvic floor and also reduces the risk of infection.

[0003] Currently, because the instrument needs to generate a high-intensity magnetic field, the power module voltage is high and there are many control circuit components, resulting in a large device size. Patients can only go to the hospital for treatment, which is inconvenient and cannot meet the needs of home use. However, with the development of embedded technology, it is expected that its size can be reduced by controlling the magnetic field drive through low-voltage equipment.

[0004] There is an urgent need for a smaller pelvic floor magnetic therapy device to meet the needs of portability and home use. Summary of the Invention

[0005] To address the problem of inconvenience in carrying existing pelvic floor magnetic therapy devices, this invention proposes a portable home-use pelvic floor magnetic therapy device. By using an MCU chip, a multivibrator, and a full-bridge drive circuit to control an LLC resonant circuit to drive a thyristor circuit, the on / off frequency and output intensity of the magnetic therapy coil can be adjusted. The embedded design greatly reduces the size of the circuit section, and the housing solves the problem of inconvenience in carrying pelvic floor magnetic therapy devices.

[0006] To achieve the above objectives, this utility model proposes a portable home-use pelvic floor magnetic therapy device, including a handle. A magnetic therapy coil is disposed within the handle, and a control circuit is provided within the magnetic therapy coil. The handle is connected to a power source via the control circuit. A housing is disposed outside the control circuit. The control circuit includes a current module, a rectifier circuit, an LLC resonant circuit, a drive circuit, and a controller. The current module includes 220V AC power. The live and neutral wires of the 220V AC power are connected to an EMI circuit. The EMI circuit is connected to the rectifier circuit. The output terminal of the rectifier circuit is connected to the LLC resonant circuit. The LLC resonant circuit is connected to the drive circuit. The output terminal of the LLC resonant circuit is connected to a silicon controlled rectifier (SCR) circuit. The SCR circuit is connected to the magnetic therapy coil to form a circuit. The driving circuit includes a multivibrator and a full-bridge driving circuit. The control terminal of the multivibrator is connected to a controller, which includes an MCU chip. The MCU chip is used to output a PWM signal. The output terminal of the multivibrator is connected to the full-bridge driving circuit, and the output terminal of the full-bridge driving circuit is connected to an LLC resonant circuit. The input terminal of the MCU chip is also connected to a comparator circuit.

[0007] An EMI circuit is incorporated to prevent electromagnetic interference. A rectifier circuit then converts the 220V AC power into DC power, outputting a DC 310V voltage to charge the capacitor in the LLC resonant circuit. When the capacitor discharges, the thyristor circuit conducts, energizing the magnetic therapy coil and generating a magnetic field.

[0008] Furthermore, the rectifier circuit includes a rectifier bridge, the output of which is connected to a boost circuit, and the output of the boost circuit is connected to a voltage conversion module. The output of the voltage conversion module supplies power to the drive circuit and the controller.

[0009] A boost circuit is set up to increase the input voltage to drive the LLC resonant circuit. In addition, a voltage conversion module is set up to reduce the voltage to power the drive circuit and the controller.

[0010] Furthermore, an optocoupler unit is provided between the multivibrator and the full-bridge drive circuit. The input terminal of the optocoupler unit is connected to the multivibrator, and the output terminal of the optocoupler unit is connected to a transformer, which in turn connects to the full-bridge drive circuit. The full-bridge drive circuit includes a MOS transistor, and the base of the MOS transistor is connected to the output terminal of the transformer.

[0011] This achieves physical isolation between high-voltage (full-bridge drive circuit) and low-voltage (multivibrator control signal), avoiding interference between high-voltage and low-voltage signals and ensuring control accuracy.

[0012] Furthermore, the comparison circuit includes an isolation chip and an operational amplifier unit. The input terminal of the isolation chip is connected to the output terminal of the multivibrator, and the output terminal of the isolation chip is connected to the operational amplifier unit. The operational amplifier unit includes an LM224ADT operational amplifier chip, and the PWM signal is smoothly output through the LM224ADT operational amplifier chip and connected to the input terminal of the MCU chip.

[0013] The LM224ADT operational amplifier chip filters and linearizes the PWM signal output from the multivibrator, converting the discrete pulse signal into a smooth and continuous analog signal, which facilitates accurate sampling and analysis by the MCU chip and improves the response accuracy of the control algorithm.

[0014] A comparator circuit is set up to compare the actual output PWM signal frequency with the set value to ensure stable circuit operation.

[0015] Furthermore, the MCU chip is equipped with peripheral circuitry, which includes an LED display screen, a rotary switch, and multiple buttons. The LED display screen is connected to the MCU chip via a UART serial port, and the rotary switch and multiple buttons are connected to the input terminals of the MCU chip. The MCU chip also includes a communication module, which includes one or more combinations of Bluetooth, WiFi and infrared remote control modules.

[0016] Setting up peripheral circuits facilitates human-computer interaction and improves the ease of use of the equipment.

[0017] Furthermore, the housing has mounting holes corresponding to the LED display screen, rotary switch, and multiple buttons, and heat dissipation holes are provided on the bottom and sides of the housing. The housing is provided with a bracket for holding the handle.

[0018] The beneficial effects of this utility model through the above technical solution are as follows: This invention achieves control over the switching frequency and output intensity of the magnetic therapy coil, enabling pelvic floor magnetic therapy via a handle, and boasts the advantages of small size and portability. Employing an embedded control scheme based on an MCU chip, it integrates the complex multi-group control circuits found in traditional large-scale equipment into a microchip. By precisely controlling the multivibrator and full-bridge drive circuit through the output PWM signal, it drives the LLC resonant circuit to adjust the switching frequency and intensity of the magnetic therapy coil, replacing the traditional discrete control loop with high voltage and multiple components, thus compressing the hardware size from a circuit principle perspective. Simultaneously, optocouplers and isolation chips achieve physical isolation between strong and weak currents, ensuring the control signal's anti-interference capability while preventing the strong current module from encroaching on the size of the weak current control unit, allowing for a compact layout of the drive circuit and controller. Furthermore, the layered power supply design of the boost circuit and voltage conversion module filters and rectifies the 220V AC power, then supplies power to the strong current (LLC resonant circuit) and weak current (MCU, drive circuit) through independent modules, meeting the energy requirements of the high-intensity magnetic field while reducing the size of the low-voltage control module through voltage adaptation. With integrated peripheral circuitry (such as LED displays, rotary switches, and communication modules) and a modular housing design, the overall size of the device is significantly reduced, transforming traditional large magnetic stimulators used in hospitals into handheld, portable home devices. This effectively solves the problem of limited usage scenarios caused by the large size of existing devices, providing patients with pelvic floor disorders with more flexible and convenient treatment options. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a portable home-use pelvic floor magnetic therapy device according to the present invention; Figure 2This is a circuit diagram of a portable home-use pelvic floor magnetic therapy device according to the present invention. Figure 3 This utility model provides an EMI circuit and rectifier circuit diagram for a portable home-use pelvic floor magnetic therapy device. Figure 4 This utility model discloses a drive circuit and LLC resonant circuit diagram for a portable home-use pelvic floor magnetic therapy device. Figure 5 This is a control circuit diagram of a portable home-use pelvic floor magnetic therapy device according to the present invention. Figure 6 This utility model discloses a voltage conversion module and a comparison circuit diagram for a portable home pelvic floor magnetic therapy device.

[0020] The reference numerals in the diagram are as follows: 1 is the handle, 2 is the magnetic therapy coil, 3 is the housing, 4 is the EMI circuit, 5 is the rectifier circuit, 6 is the LLC resonant circuit, 7 is the drive circuit, 701 is the multivibrator, 702 is the full-bridge drive circuit, 8 is the thyristor circuit, 9 is the MCU chip, 10 is the comparator circuit, 101 is the isolation chip, 102 is the operational amplifier unit, 11 is the boost circuit, 12 is the voltage conversion module, 13 is the optocoupler unit, 14 is the transformer, 15 is the LED display, 16 is the rotary switch, 17 is the button, 18 is the communication module, and 19 is the stand. Detailed Implementation

[0021] Example 1 like Figures 1-6 As shown, a portable home-use pelvic floor magnetic therapy device includes a handle 1, a magnetic therapy coil 2 inside the handle 1, a control circuit in the magnetic therapy coil 2, and the handle 1 connected to a power source via the control circuit. A housing 3 surrounds the control circuit. The control circuit includes a current module, a rectifier circuit 5, an LLC resonant circuit 6, a drive circuit 7, and a controller. The current module includes 220V AC power, and the live and neutral wires of the 220V AC power are connected to an EMI circuit 4. The EMI circuit 4 (… Figure 3 (Centers L3 and L4, X capacitors: CX1, CX2, and Y capacitors: CY1, CY2, CY3, CY4) are connected to rectifier circuit 5. Figure 3 (BD1), the output terminal of the rectifier circuit 5 is connected to the LLC resonant circuit 6, the LLC resonant circuit 6 is connected to the drive circuit 7, the output terminal of the LLC resonant circuit 6 is connected to the thyristor circuit 8, and the thyristor circuit 8 is connected to the magnetic therapy coil 2 to form a circuit; The driving circuit 7 includes a multivibrator 701 and a full-bridge driving circuit 702. The control terminal of the multivibrator 701 is connected to a controller. The controller includes an MCU chip 9. The MCU chip 9 is used to output PWM signals. The output terminal of the multivibrator 701 is connected to the full-bridge driving circuit 702. The output terminal of the full-bridge driving circuit 702 is connected to an LLC resonant circuit 6. The input terminal of the MCU chip 9 is also connected to a comparator circuit 10.

[0022] The rectifier circuit 5 includes a rectifier bridge, the output of which is connected to a boost circuit 11. The output of the boost circuit 11 is connected to a voltage conversion module 12, and the output of the voltage conversion module 12 supplies power to the drive circuit 7 and the controller.

[0023] An optocoupler unit 13 is provided between the multivibrator 701 and the full-bridge drive circuit 702. Figure 5 (OPT1~OPT5), the input terminal of the optocoupler unit 13 is connected to the multivibrator 701, and the output terminal of the optocoupler unit 13 is connected to the transformer 14 ( Figure 4 The transformers T3 and T4 are connected to the full-bridge drive circuit 702 via transformer 14. The full-bridge drive circuit 702 includes MOS transistors, the base of which is connected to the output terminal of transformer 14.

[0024] The comparison circuit 10 includes an isolation chip 101 and an operational amplifier unit 102. The input terminal of the isolation chip 101 is connected to the output terminal of the multivibrator 701, and the output terminal of the isolation chip 101 is connected to the operational amplifier unit 102. The operational amplifier unit 102 includes an LM224ADT operational amplifier chip, and the PWM signal is smoothly output through the LM224ADT operational amplifier chip and connected to the input terminal of the MCU chip 9.

[0025] The MCU chip 9 is equipped with peripheral circuitry, which includes an LED display screen 15, a rotary switch 16, and multiple buttons 17. The LED display screen 15 is connected to the MCU chip 9 via a UART serial port, and the rotary switch 16 and multiple buttons 17 are connected to the input terminals of the MCU chip 9. The MCU chip 9 is also provided with a communication module 18, which includes one or more combinations of Bluetooth module, WiFi module and infrared remote control module.

[0026] The housing 3 has mounting holes corresponding to the LED display screen 15, rotary switch 16, and multiple buttons 17. Heat dissipation holes are also provided on the bottom and sides of the housing 3. A bracket 19 is provided on the housing 3, and the bracket 19 is used to place the handle 1.

[0027] The bracket 19 is C-shaped, and the handle 1 is U-shaped. The handle 1 is attached to the bracket 19, which facilitates the storage of the equipment and improves its portability.

[0028] In this embodiment, the multivibrator 701 uses the HEF4583 chip, the MCU chip 9 uses the STM32 microcontroller, the isolation chip 101 uses the 6N137SM chip, the voltage conversion module 12 uses the HE12P24LRN chip, and the communication module 18 uses the Bluetooth module, specifically the HC05 Bluetooth module.

[0029] During operation, the user uses the rotary switch 16 and multiple buttons 17 to select functions and adjust parameters. Operation commands are transmitted to the MCU chip 9 (STM32 microcontroller), which simultaneously transmits device status information to the LED display screen 15 via UART serial communication for display, enabling human-machine interaction. The communication module (HC05 Bluetooth module) allows the device to wirelessly connect to external devices, facilitating remote operation or data transmission. External devices include mobile phones.

[0030] The circuit is connected to 220V AC power via a power cord. After the operation command is issued, the current is filtered for electromagnetic interference by EMI circuit 4 (L3, L4, CX1, CX2, CY1-CY4), and then rectified by rectifier circuit 5 (BD1). After being boosted by boost circuit 11, it is converted to a suitable voltage (DC12V) by voltage conversion module 12 (HE12P24LRN chip) to power drive circuit 7 and controller. MCU chip 9 outputs a PWM signal to control multivibrator 701 (HEF4583 chip). Its output signal is isolated by optocoupler unit 13 (OPT1-OPT5), converted by transformer 14 (T3, T4), and then drives the MOSFET in full-bridge drive circuit 702, thereby controlling LLC resonant circuit 6. LLC resonant circuit 6 is connected to receive high-voltage current (DC310V) via boost circuit 11. The capacitor of LLC resonant circuit 6 is charged. During the discharge process, it controls the conduction of thyristor circuit 8, and the current flows to magnetic therapy coil 2 to generate a magnetic field.

[0031] In addition, the output signal of the multivibrator 701 is processed by the isolation chip 101 (6N137SM chip) and the operational amplifier unit 102 (LM224ADT operational amplifier chip) and then fed back to the MCU chip 9 to realize closed-loop control and ensure the stable operation of the circuit.

[0032] During operation, heat is dissipated through ventilation holes on the bottom and sides of the housing 3. An exhaust fan can also be added to accelerate heat dissipation.

[0033] When the device is not in use, the U-shaped handle 1 can be stored in the C-shaped bracket 19.

[0034] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A portable home-use pelvic floor magnetic therapy device, comprising a handle (1), wherein a magnetic therapy coil (2) is disposed inside the handle (1), the magnetic therapy coil (2) is provided with a control circuit, the handle (1) is connected to a power source through the control circuit, and a housing (3) is disposed outside the control circuit, characterized in that, The control circuit includes a current module, a rectifier circuit (5), an LLC resonant circuit (6), a drive circuit (7), and a controller. The current module includes 220V AC power. The live wire and neutral wire of the 220V AC power are connected to an EMI circuit (4). The EMI circuit (4) is connected to the rectifier circuit (5). The output terminal of the rectifier circuit (5) is connected to the LLC resonant circuit (6). The LLC resonant circuit (6) is connected to the drive circuit (7). The output terminal of the LLC resonant circuit (6) is connected to a thyristor circuit (8). The thyristor circuit (8) is connected to the magnetic therapy coil (2) to form a loop. The driving circuit (7) includes a multivibrator (701) and a full-bridge driving circuit (702). The control terminal of the multivibrator (701) is connected to a controller. The controller includes an MCU chip (9). The MCU chip (9) is used to output PWM signals. The output terminal of the multivibrator (701) is connected to the full-bridge driving circuit (702). The output terminal of the full-bridge driving circuit (702) is connected to an LLC resonant circuit (6). The input terminal of the MCU chip (9) is also connected to a comparator circuit (10).

2. A home portable pelvic floor magnetic treatment device according to claim 1, wherein, The rectifier circuit (5) includes a rectifier bridge, the output of which is connected to a boost circuit (11), the output of which is connected to a voltage conversion module (12), and the output of which supplies power to the drive circuit (7) and the controller.

3. A home portable pelvic floor magnetic treatment device according to claim 1, wherein, An optocoupler unit (13) is provided between the multivibrator (701) and the full-bridge drive circuit (702). The input terminal of the optocoupler unit (13) is connected to the multivibrator (701), and the output terminal of the optocoupler unit (13) is connected to a transformer (14). The full-bridge drive circuit (702) is connected through the transformer (14). The full-bridge drive circuit (702) includes a MOS transistor, and the base of the MOS transistor is connected to the output terminal of the transformer (14).

4. The at-home portable magnetic pelvic floor therapy device of claim 1, wherein, The comparison circuit (10) includes an isolation chip (101) and an operational amplifier unit (102). The input terminal of the isolation chip (101) is connected to the output terminal of the multivibrator (701), and the output terminal of the isolation chip (101) is connected to the operational amplifier unit (102). The operational amplifier unit (102) includes an LM224ADT operational amplifier chip. The PWM signal is smoothly output through the LM224ADT operational amplifier chip and connected to the input terminal of the MCU chip (9).

5. The at-home portable magnetic pelvic floor therapy device of claim 1, wherein, The MCU chip (9) is equipped with peripheral circuits, including an LED display screen (15), a rotary switch (16) and multiple buttons (17). The LED display screen (15) is connected to the MCU chip (9) via UART serial port communication. The rotary switch (16) and multiple buttons (17) are connected to the input terminals of the MCU chip (9). The MCU chip (9) is also provided with a communication module (18), which includes one or more combinations of Bluetooth module, WiFi module and infrared remote control module.

6. A home portable pelvic floor magnetic treatment device according to claim 5, wherein, The housing (3) has mounting holes corresponding to the LED display screen (15), rotary switch (16) and multiple buttons (17). Heat dissipation holes are provided on the bottom and sides of the housing (3). A bracket (19) is provided on the housing (3), which is used to place the handle (1).

Images