A transcranial magnetic stimulation (TMS) device main unit and its driving circuit

Abstract

This application relates to the field of transcranial magnetic stimulation (TMS) technology, and discloses a TMS device host and its driving circuit. The TMS device host includes a first circuit board, a second circuit board, a third circuit board, and a fourth circuit board. The first circuit board is used to house a rectifier circuit module and a boost circuit module; the second circuit board is used to house a stimulation circuit module, which includes an energy storage capacitor and a first output switch; the third circuit board is used to house a control circuit module; and the fourth circuit board is used to house an auxiliary driving circuit for the first output switch. Both the energy storage capacitor and the first output switch are connected to the stimulation coil via the second circuit board. The first circuit board is connected to the second, third, and fourth circuit boards respectively. The TMS device host and its driving circuit provided in this application can reduce the size and weight of the TMS device host, thereby achieving portability.

Description

Technical Field

[0001] This application relates to the field of transcranial magnetic stimulation technology, and in particular to a transcranial magnetic stimulation device host and its driving circuit. Background Technology

[0002] Transcranial magnetic stimulation (TMS) is an interdisciplinary technology combining biomedicine and electromagnetics. Biological tissues and organs contain trace elements and proteins that exhibit paramagnetism and conductivity. When these tissues are placed in a sufficiently large, time-varying magnetic field, an induced electromotive force is generated. When this electromotive force superimposes on and accumulates to a certain level with the cell membrane potential, it induces nerve impulses, thereby regulating the organism's related physiological functions.

[0003] Transcranial magnetic stimulation (TMS) devices generate this time-varying magnetic field. Clinical studies have shown that TMS has positive effects on the treatment of many neurological diseases, especially depression. Existing TMS devices typically consist of a main unit and stimulation coils. However, the main units of current commercially available TMS devices are large and heavy, resulting in a large footprint and difficulty in transportation. Summary of the Invention

[0004] The purpose of this application is to provide a transcranial magnetic stimulation (TMS) device host and its driving circuit, thereby reducing the size and weight of the TMS device host and making the TMS device more portable.

[0005] To address the aforementioned technical problems, embodiments of this application provide a transcranial magnetic stimulation (TMS) device host, comprising a first circuit board, a second circuit board, a third circuit board, and a fourth circuit board. The first circuit board is used to house a rectifier circuit module and a boost circuit module; the second circuit board is used to house a stimulation circuit module, which includes an energy storage capacitor and a first output switch; the third circuit board is used to house a control circuit module; and the fourth circuit board is used to house an auxiliary drive circuit for the first output switch. The energy storage capacitor and the first output switch are both connected to the stimulation coil via the second circuit board; the first circuit board is connected to the second circuit board, the third circuit board, and the fourth circuit board.

[0006] In addition, the second circuit board is provided with a connection terminal. The end of the connection terminal facing the second circuit board is fixedly connected to the second circuit board, and the end of the connection terminal away from the second circuit board is connected to the stimulation coil.

[0007] In addition, the fourth circuit board is disposed on the side of the second circuit board that is horizontally away from the third circuit board.

[0008] In addition, the first circuit board is disposed below the third circuit board, and the first circuit board is connected to the second circuit board via a first connector, and the first circuit board is connected to the third circuit board via a second connector.

[0009] In addition, the first circuit board is provided with a first connector, and the fourth circuit board is provided with a second connector. The first connector and the second connector are connected by a wire harness.

[0010] In addition, the aforementioned transcranial magnetic stimulation device also includes a heat dissipation base; the heat dissipation base is located below the first circuit board, the second circuit board, the third circuit board, and the fourth circuit board.

[0011] This application embodiment also provides a drive circuit for a transcranial magnetic stimulation (TMS) device host, including a rectifier circuit module, a control circuit module, a boost circuit module, and a stimulation circuit module. The rectifier circuit module is used to receive a power supply voltage from a power source, rectify and boost the power supply voltage to output a first voltage, and rectify and buck the power supply voltage to output a second voltage. The control circuit module is used to receive the second voltage to power itself and to receive a magnetic stimulation trigger command from a host computer to output a charging control signal and a discharging control signal. The boost circuit module is used to receive the first voltage and boost the first voltage to output a third voltage when the charging control signal is received. The stimulation circuit module includes an energy storage capacitor. The stimulation circuit module is used to receive the third voltage to charge the energy storage capacitor, and the energy storage capacitor discharges to the stimulation coil when the discharging control signal is received.

[0012] In addition, the stimulation circuit module also includes a first output switch, and the output terminal of the energy storage capacitor is connected to the stimulation coil through the first output switch; the input terminal of the first output switch is also connected to the discharge control signal output terminal of the control circuit.

[0013] In addition, the boost circuit module includes a full-bridge resonant circuit and a second output switch. The first input terminal of the full-bridge resonant circuit is connected to the boost output terminal of the rectifier circuit module, the second input terminal of the full-bridge resonant circuit is connected to the charging control signal output terminal of the control circuit module, and the output terminal of the full-bridge resonant circuit is connected to the energy storage capacitor through the second output switch.

[0014] In addition, the control circuit module is communicatively connected to the host computer; the control circuit module is used to output the charging control signal to the boost circuit module and the discharging control signal to the stimulation circuit module.

[0015] Compared with the prior art, the technical solution provided in this application has the following advantages:

[0016] This application addresses the shortcomings of existing transcranial magnetic stimulation (TMS) devices, which are large and heavy. By improving the drive circuit and hardware component structure of the TMS device, a compact TMS device with small size and light weight is obtained, thus achieving portability of the TMS device.

[0017] The transcranial magnetic stimulation (TMS) host provided in this application includes multiple circuit boards and a drive circuit for the TMS host. The circuit boards are arranged in a stacked structure and connected by board-to-board connectors. The board-to-board connectors serve as both current paths and support structures, effectively utilizing space, reducing the weight and volume of the host, and shortening the current transmission path, thereby reducing voltage loss and electromagnetic interference.

[0018] Furthermore, the drive circuit of the transcranial magnetic stimulation (TMS) device provided in this embodiment includes four modules: a rectifier circuit module, a boost circuit module, a stimulation circuit module, and a control circuit module. These modules, combined with an external stimulation coil, enable bidirectional pulse current flow and energy recovery, simplifying the circuit structure. The TMS device and its drive circuit of this embodiment are compact, small in size and weight, portable, and cost-effective, making them suitable for small hospitals, clinics, homes, and other applications. They can also be used in conjunction with other therapies for diagnosis or in animal experiments. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a transcranial magnetic stimulation device main unit provided in one embodiment of this application;

[0021] Figure 2 This is a block diagram of the drive circuit of the transcranial magnetic stimulation device host provided in one embodiment of this application;

[0022] Figure 3 This is a block diagram of the driving circuit for the second output switch in a boost circuit module provided in an embodiment of this application;

[0023] Figure 4 This is a circuit diagram of the driving circuit for the second output switch in a boost circuit module provided in one embodiment of this application. Detailed Implementation

[0024] As can be seen from the background technology, the main unit of the transcranial magnetic stimulation device currently on the market has the disadvantages of being large in size and heavy in weight, which leads to the problem that transcranial magnetic stimulation devices generally occupy a large area and are difficult to transport.

[0025] Analysis revealed that the internal structure of existing transcranial magnetic stimulation (TMS) devices is complex, with numerous circuit board components and structural support parts, resulting in a large size and footprint of the main unit, typically exceeding 40L. The main unit is also quite heavy, usually weighing over 30kg, making it very difficult to move.

[0026] To address this technical problem, the embodiments of this application improve the drive circuit and hardware component structure of the transcranial magnetic stimulation device host to overcome the shortcomings of the large size and heavy weight of the transcranial magnetic stimulation device host.

[0027] See Figure 1 This application also provides a transcranial magnetic stimulation (TMS) device host, including a first circuit board 1, a second circuit board 2, a third circuit board 3, and a fourth circuit board 4; the first circuit board 1 is used to set up a rectifier circuit module 101 and a boost circuit module 102; the second circuit board 2 is used to set up a stimulation circuit module 103, the stimulation circuit module 103 including a first output switch 21 and an energy storage capacitor 22; the third circuit board 3 is used to set up a control circuit module 104; the fourth circuit board 4 is used to set up an auxiliary drive circuit for the first output switch 21; the first output switch 21 and the energy storage capacitor 22 are both connected to the stimulation coil through the second circuit board 2; the first circuit board 1 is connected to the second circuit board 2, the third circuit board 3, and the fourth circuit board 4 respectively.

[0028] Please continue reading. Figure 1In some embodiments, the first circuit board 1 is a circuit board for a rectifier circuit and a boost circuit, used to house the rectifier circuit module 101 and the boost circuit module 102; the second circuit board 2 is an interface circuit board, serving as a carrier for interconnecting the first output switch 21, the energy storage capacitor 22, and the stimulation coil of the stimulation circuit module 103. The fourth circuit board 4 is an auxiliary drive circuit board for the first output switch 21, used to house the auxiliary drive circuit for the first output switch 21. The transcranial magnetic stimulation (TMS) device host of this embodiment also includes a housing 10, with the first circuit board 1, the second circuit board 2, the third circuit board 3, and the fourth circuit board 4 all disposed inside the housing 10. The second circuit board 2 and the third circuit board 3 are arranged in parallel, with the third circuit board 3 positioned above the first circuit board 1. The fourth circuit board 4 can be positioned beside the first output switch 21 and is connected to the first circuit board 1. An energy storage capacitor 22 is mounted on a second circuit board 2. A first output switch 21 is mounted on the side of the second circuit board 2 furthest from the energy storage capacitor 22. The first output switch 21 uses a high-power IGBT (containing a freewheeling diode). The top of the first output switch 21 is connected to the bottom of the second circuit board 2 via a connector, such as a bolt or nut. A second output switch 11 is mounted on the side of the first circuit board 1 furthest from the third circuit board 3. The second output switch 11 uses a low-power IGBT. The side of the second output switch 11 closest to the first circuit board 1 is fixedly connected to the first circuit board 1, specifically, by welding or other fixing methods.

[0029] In some embodiments, the second circuit board 2 is provided with a connection terminal 23. The end of the connection terminal 23 facing the second circuit board 2 is fixedly connected to the second circuit board 2, and the end of the connection terminal 23 away from the second circuit board 2 is connected to the stimulation coil.

[0030] like Figure 1 As shown, multiple connection terminals 23 can be provided, and the connection terminals 23 are PCB connection terminals. One end of the connection terminal 23 is soldered to the second circuit board 2, and the other end is connected to the external stimulation coil. That is, the second circuit board 2 and the external stimulation coil are connected through the connection terminals 23 soldered on the second circuit board 2. This interconnection method does not require additional support structures or copper busbars, which helps to reduce the weight and size of the host.

[0031] like Figure 1 As shown, in some embodiments, the fourth circuit board 4 is disposed on the side of the second circuit board 2 that is horizontally away from the third circuit board 3.

[0032] In some embodiments, the first circuit board 1 is disposed below the third circuit board 3, and the first circuit board 1 and the second circuit board 2 are connected by a first connector 12, and the first circuit board 1 and the third circuit board 3 are connected by a second connector 13.

[0033] In some embodiments, the fourth circuit board 4 is an IGBT driver circuit board used to assist the first output switch 21 in operation. The fourth circuit board 4 is disposed on the side of the second circuit board 2 that is horizontally away from the third circuit board 3; that is, the fourth circuit board 4 and the third circuit board 3 are respectively disposed on opposite sides of the second circuit board 2 in the horizontal direction. Figure 1 As shown, the first circuit board 1 is disposed below the third circuit board 3. The second circuit board 2, the third circuit board 3, and the fourth circuit board 4 are arranged in parallel, and their upper or lower surfaces are flush. The side of the fourth circuit board 4 near the first output switch 21 is in close contact with the first output switch 21, and the side of the fourth circuit board 4 near the first output switch 21 is connected to the first output switch 21 by bolts.

[0034] like Figure 1 As shown, both the first connector 12 and the second connector 13 are board-to-board connectors. These connectors serve as signal paths between two circuit boards and also provide support. To facilitate the placement of the first connector 12, the side of the first circuit board 1 closest to the second circuit board 2 extends beyond the side of the third circuit board 3 closest to the second circuit board 2. In other words, the orthographic projection of the side of the second circuit board 2 closest to the first circuit board 1 overlaps with the first circuit board 1. The first connector 12 is positioned within this overlapping area to connect the first circuit board 1 and the second circuit board 2. The second connector 13 can be located at the end of the third circuit board 3 closest to the second circuit board 2 to connect the third circuit board 3 and the first circuit board 1.

[0035] Specifically, the first circuit board 1 (rectifier and boost circuit board) and the second circuit board 2 (interface circuit board) are connected via the first connector 12. This interconnection method allows the first connector 12 to serve both as a current path and as partial support for the second circuit board 2, reducing the weight and size of the host. Similarly, the first circuit board 1 and the third circuit board 3 (control circuit board) are connected via the second connector 13. This interconnection method allows the second connector 13 to serve both as a current path and as partial support for the third circuit board 3, also reducing the weight and size of the host.

[0036] like Figure 1As shown, the third circuit board 3 is also equipped with a third connector 31, which is used to connect the third circuit board 3 to the host computer. The third circuit board 3 interacts with the external host computer through the third connector 31, that is, the third circuit board 3 collects analog signals such as temperature and voltage of the system, monitors the operating status of the system, and uploads the relevant data to the host computer.

[0037] In some embodiments, the first circuit board 1 is provided with a first connector 14, and the fourth circuit board 4 is provided with a second connector 41. The first connector 14 and the second connector 41 are connected by a wire harness.

[0038] like Figure 1 As shown, the first connector 14 is located on the side of the first circuit board 1 away from the third circuit board 3, and the second connector 41 is located on the upper edge of the fourth circuit board 4. The first connector 14 and the second connector 41 are connected by a wire harness to realize the connection between the first circuit board 1 and the fourth circuit board 4.

[0039] In some embodiments, the transcranial magnetic stimulation device host also includes a heat dissipation base 5; the heat dissipation base 5 is located below the first circuit board 1, the second circuit board 2, and the third circuit board 3.

[0040] like Figure 1 As shown, the first circuit board 1 is mounted on top of the heat sink 5 via a bracket, with a gap between the lower surface of the first circuit board 1 and the upper surface of the heat sink 5. The second output switch 11 is mounted on the lower surface of the first circuit board 1, and the bottom surface of the second output switch 11 is in contact with the heat sink 5. Similarly, the first output switch 21 is mounted on the lower surface of the second circuit board 2, and the bottom surfaces of both the first output switch 21 and the second output switch 11 are in close contact with the upper surface of the heat sink 5 to ensure the heat dissipation effect of the heat sink 5 on the first output switch 21 and the second output switch 11.

[0041] In some embodiments, the heat sink 5 is made of a heat-dissipating material such as aluminum or silicon. Multiple heat dissipation holes may be formed on the heat sink 5 to enhance heat dissipation.

[0042] This application provides a compact transcranial magnetic stimulation (TMS) device host. By simplifying the structure of the TMS host, placing each circuit module on a circuit board, and rationally arranging the circuits, the host structure is simplified, thereby reducing the size and weight of the TMS host. The compact TMS host provided in this application has the advantages of small size and light weight, with a volume of approximately 5L and a weight of approximately 5kg, achieving portability of the TMS device. At the same time, the magnetic stimulation intensity of the TMS host provided in this application can reach above 0.9T. Due to its compact structure, small size, and light weight, the TMS host provided in this application is not only low in cost but also easy to carry, making it suitable for applications in small hospitals, clinics, and homes. It can also be used in combination with other therapies for diagnosis or in animal experiments.

[0043] See Figure 2 This application also provides a driving circuit for a transcranial magnetic stimulation (TMS) device, comprising: a rectifier circuit module 101, a boost circuit module 102, a stimulation circuit module 103, and a control circuit module 104; the rectifier circuit module 101 is used to receive a power supply voltage from a power source, rectify and boost the power supply voltage to output a first voltage, and rectify and buck the power supply voltage to output a second voltage; the control circuit module 104 is used to receive the second voltage to power itself, and to receive a magnetic stimulation trigger command from a host computer to output a charging control signal and a discharging control signal; the boost circuit module 102 is used to receive the first voltage, and boost the first voltage to output a third voltage when the charging control signal is received; the stimulation circuit module 103 includes an energy storage capacitor 22; the stimulation circuit module 103 is used to receive the third voltage to charge the energy storage capacitor 22, and the energy storage capacitor 22 discharges to the stimulation coil when the discharging control signal is received.

[0044] It should be noted that the drive circuit of the transcranial magnetic stimulation device host provided in this application embodiment can be applied to the transcranial magnetic stimulation device host provided in this application embodiment. This application embodiment not only simplifies the host structure, but also simplifies the host drive circuit, making the structure of the transcranial magnetic stimulation device host more compact, thereby realizing the lightweight and portable nature of the transcranial magnetic stimulation device host.

[0045] like Figure 2As shown, the drive circuit of the transcranial magnetic stimulation (TMS) device provided in this embodiment includes four modules: a rectifier circuit module 101, a boost circuit module 102, a stimulation circuit module 103, and a control circuit module 104. These modules, combined with an external stimulation coil, enable bidirectional pulse current flow and energy recovery, simplifying the circuit structure. Specifically, the rectifier circuit module 101 rectifies and boosts the power supply voltage to output a first voltage, converting 220V AC to approximately 310V DC (the first voltage). The boost circuit module 102 then boosts this first voltage to output a third voltage, increasing the DC voltage from approximately 310V to over 1000V. This then charges the energy storage capacitor 22. Once the energy storage capacitor 22 is fully charged, it discharges into the external stimulation coil in a controlled mode. The stimulation coil generates a time-varying magnetic field in the target area, achieving the purpose of magnetic stimulation.

[0046] It should be noted that the second voltage output by the rectifier circuit module 101, which rectifies and steps down the supply voltage, provides power to the control circuit module 104. The control circuit module 104 interacts with the host computer, receiving magnetic stimulation trigger commands from the host computer and generating charging and discharging control signals according to a certain timing sequence to control the operation of related high-voltage circuits.

[0047] In some embodiments, the stimulation circuit module 103 further includes a first output switch 21, the output terminal of the energy storage capacitor 22 is connected to the stimulation coil through the first output switch 21; the input terminal of the first output switch 21 is also connected to the discharge control signal output terminal of the control circuit.

[0048] In some embodiments, the first output switch can be a high-power insulated gate bipolar transistor (IGBT). When the energy storage capacitor 22 is fully charged, the stimulation circuit module 103 receives the discharge control signal from the control circuit module 104, and the energy storage capacitor 22 discharges to the external stimulation coil through the first output switch 21 to generate magnetic stimulation. The energy storage capacitor 22 and the external stimulation coil operate in a resonant state, which enables the transcranial magnetic stimulation instrument to output bidirectional stimulation pulses and recover the remaining energy of the coil. Moreover, the circuit structure is simple and suitable for compact magnetic stimulation instruments.

[0049] In some embodiments, the boost circuit module 102 includes a full-bridge resonant circuit and a second output switch 11. The first input terminal of the full-bridge resonant circuit is connected to the boost output terminal of the rectifier circuit module 101, the second input terminal of the full-bridge resonant circuit is connected to the charging control signal output terminal of the control circuit module 104, and the output terminal of the full-bridge resonant circuit is connected to the energy storage capacitor 22 through the second output switch 11.

[0050] In some embodiments, the full-bridge resonant circuit is a full-bridge LC series resonant topology. The full-bridge LC series resonant topology has the characteristics of high efficiency and constant current output, making it suitable for charging high-voltage capacitors. Furthermore, the full-bridge resonant circuit can boost the first voltage to output a third voltage of over 1000V to charge the energy storage capacitor 22. To prevent a short circuit due to voltage polarity reversal in the energy storage capacitor 22 during circuit operation, a second output switch 11 is typically provided between the full-bridge resonant circuit and the energy storage capacitor 22.

[0051] In some embodiments, the second output switch 11 can be a low-power insulated-gate bipolar transistor (IGBT). The second output switch 11 employs a self-controlled drive circuit, significantly reducing the area of ​​auxiliary components and the circuit board. For example... Figure 3 As shown, the self-control drive circuit of the second output switch 11 includes: a pre-charge module 111, a conduction control module 112, a disconnection control module 113, and a switch module 114. Figure 3 The intermediate switch Q is the second output switch. The input terminal of the pre-charge module 111 is connected to the power output terminal, the input terminal of the conduction control module 112 is connected to the output terminal of the pre-charge module 111, the input terminal of the disconnection control module 113 is connected to the output terminal of the pre-charge module 111, the control input terminal of the main switch module 114 is connected to the output terminal of the conduction control module 112, the power input terminal of the main switch module 114 is connected to the power output terminal, and the output terminal of the main switch module is connected to the capacitor to be charged.

[0052] See Figure 3 The pre-charging module 111 is a pre-charging circuit, and the energy storage capacitor 22 is a high-voltage capacitor C. Before the second output switch 11 (switch Q) reaches the turn-on condition, the pre-charging capacitor in the pre-charging circuit will be charged first. After the pre-charging capacitor is fully charged, it will be used as the driving power for switch Q. The conduction control module 112 is the turn-on control circuit for switch Q. When the voltage of the pre-charging capacitor reaches a certain threshold, the pre-charging capacitor will be connected to the gate of switch Q, thereby turning on switch Q. The disconnection control module 113 is the disconnection control circuit for switch Q. The disconnection delay time can be set to the time it takes for the high-voltage capacitor C to be fully charged. When the delay time ends, the charge of the pre-charging capacitor will be quickly discharged, thereby disconnecting switch Q.

[0053] See Figure 4 ,for Figure 3 The circuit diagram corresponding to the module diagram of the drive circuit for the second output switch in the boost circuit. Before switch Q meets the turn-on condition, the pre-charge capacitor C2 in the pre-charge circuit is charged first. After the pre-charge capacitor C2 is fully charged, it is used as the drive power supply for switch Q. When the voltage of the pre-charge capacitor C2 reaches a certain threshold, it is then connected to the gate of switch Q, thereby turning on switch Q. The disconnection control module 113 is the main switch disconnection control circuit. The disconnection delay time can be set to the time it takes for the high-voltage capacitor C to fully charge. When the delay time ends, the charge of the pre-charge capacitor C2 is quickly discharged, thereby disconnecting switch Q. Capacitor C1 and pre-charge capacitor C2 start charging at the same time. When the voltage of capacitor C1 reaches the conduction threshold of transistor Q1, transistor Q1 starts to conduct, followed by transistor Q2. The current quickly charges capacitor C1 through transistor Q2, and the voltage of capacitor C1 rises rapidly, causing transistor Q1 to quickly enter the saturation conduction state. This allows the charge of pre-charge capacitor C2 to be quickly released through resistor R2 and transistor Q1. When pre-charge capacitor C2 is discharged to a sufficiently low level, switch Q will turn off.

[0054] Therefore, the self-control drive circuit of the second output switch 11 not only simplifies the type and number of components in the circuit, but also reduces the size of the circuit, which is conducive to the miniaturization of the system. This makes the design of the transcranial magnetic stimulation device host more compact, reduces the size and weight of the host, and helps to realize the portability of the transcranial magnetic stimulation device host.

[0055] In some embodiments, the first output switch 21 and / or the second output switch 11 include an insulated gate bipolar transistor.

[0056] Specifically, the first output switch 21 uses a high-power IGBT. When magnetic stimulation occurs, the energy storage capacitor 22 and the external stimulation coil operate in a resonant state, enabling the transcranial magnetic stimulation instrument to output bidirectional stimulation pulses and recover the remaining energy of the coil. The second output switch 11 uses a low-power IGBT self-control drive circuit, reducing the area of ​​auxiliary components and circuit boards.

[0057] In some embodiments, the control circuit module 104 is communicatively connected to the host computer; the control circuit module 104 is used to output the charging control signal to the boost circuit module 102 and the discharging control signal to the stimulation circuit module 103.

[0058] See Figure 2The control circuit module 104 receives external magnetic stimulation trigger commands and generates charging control signals and discharging control signals according to a certain timing sequence, which are used to control the operation of the boost circuit module 102 and the stimulation circuit module 103, respectively. At the same time, the control circuit module 104 collects analog signals such as system temperature and voltage, monitors the system's operating status, and uploads the relevant data to the host computer.

[0059] Therefore, the drive circuit of the transcranial magnetic stimulation (TMS) device provided in this embodiment includes four modules: a rectifier circuit module 101, a boost circuit module 102, a stimulation circuit module 103, and a control circuit module 104. These modules, combined with the stimulation coil, enable bidirectional pulse current flow and energy recovery, simplifying the circuit structure. This embodiment achieves bidirectional pulse current flow and energy recovery through a combination of a second output switch 11, an energy storage capacitor 22, a first output switch 21 (containing a freewheeling diode), and an external stimulation coil. Furthermore, the second output switch 11 employs a self-controlled switching method. By simplifying the drive circuit of the TMS device, the circuit size and weight of the device are significantly reduced while retaining its primary bidirectional rTMS stimulation function.

[0060] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A transcranial magnetic stimulation (TMS) device main unit, characterized in that, include: The first circuit board is used to set up the rectifier circuit module and the boost circuit module; The second circuit board is used to set up the stimulation circuit module; the stimulation circuit module includes an energy storage capacitor and a first output switch. The third circuit board is used to set up the control circuit module; The fourth circuit board is used to set the auxiliary drive circuit for the first output switch; The energy storage capacitor and the first output switch are both connected to the stimulation coil via the second circuit board; the first circuit board is connected to the second circuit board, the third circuit board, and the fourth circuit board respectively; The second circuit board is provided with a connection terminal. The end of the connection terminal facing the second circuit board is fixedly connected to the second circuit board, and the end of the connection terminal away from the second circuit board is connected to the stimulation coil. The fourth circuit board is disposed on the side of the second circuit board that is horizontally away from the third circuit board; The first circuit board is disposed below the third circuit board, and the first circuit board is connected to the second circuit board via a first connector, and the first circuit board is connected to the third circuit board via a second connector.

2. The transcranial magnetic stimulation (TMS) device main unit according to claim 1, characterized in that, The first circuit board is provided with a first connector, and the fourth circuit board is provided with a second connector. The first connector and the second connector are connected by a wire harness.

3. The transcranial magnetic stimulation (TMS) device main unit according to claim 1 or 2, characterized in that, It also includes a heat sink; the heat sink is located below the first circuit board, the second circuit board, the third circuit board, and the fourth circuit board.

4. A drive circuit for a transcranial magnetic stimulation (TMS) device host, applied to the TMS device host according to any one of claims 1 to 3, characterized in that, include: The rectifier circuit module is used to receive the power supply voltage from the power supply terminal, rectify and boost the power supply voltage to output a first voltage, and rectify and buck the power supply voltage to output a second voltage. The control circuit module is used to receive the second voltage to power itself, and to receive magnetic stimulation triggering instructions from the host computer to output charging control signals and discharging control signals. A boost circuit module is used to receive the first voltage and boost the first voltage to output a third voltage when the charging control signal is received. The stimulation circuit module includes an energy storage capacitor; the stimulation circuit module is used to receive the third voltage to charge the energy storage capacitor, and the energy storage capacitor discharges to the stimulation coil when the discharge control signal is received.

5. The drive circuit of the transcranial magnetic stimulation device main unit according to claim 4, characterized in that, The stimulation circuit module further includes a first output switch, and the output terminal of the energy storage capacitor is connected to the stimulation coil through the first output switch; the input terminal of the first output switch is also connected to the discharge control signal output terminal of the control circuit.

6. The drive circuit of the transcranial magnetic stimulation device main unit according to claim 5, characterized in that, The boost circuit module includes a full-bridge resonant circuit and a second output switch. The first input terminal of the full-bridge resonant circuit is connected to the boost output terminal of the rectifier circuit module, the second input terminal of the full-bridge resonant circuit is connected to the charging control signal output terminal of the control circuit module, and the output terminal of the full-bridge resonant circuit is connected to the energy storage capacitor through the second output switch.

7. The driving circuit of the transcranial magnetic stimulation device main unit according to any one of claims 4 to 6, characterized in that, The control circuit module is communicatively connected to the host computer. The control circuit module is used to output the charging control signal to the boost circuit module and the discharging control signal to the stimulation circuit module.

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