An ultrasonic physiotherapy system

Abstract

The application relates to the physiotherapy technical field and particularly relates to an ultrasonic physiotherapy system which comprises a power module, a signal generation module, a single-tube power amplification module and an ultrasonic transducing module which are electrically connected in sequence, characterized in that the power tube drain of the single-tube power amplification module is connected to the positive pole of a direct current power supply through a first inductor to form a feeding structure; the power tube drain of the single-tube power amplification module is connected to the ultrasonic transducing module through a second inductor; the second inductor and the equivalent capacitor of the ultrasonic transducing module form a series resonant network, and the inductive reactance of the first inductor limits the average current of the power tube drain of the single-tube power amplification module within a safety threshold when the ultrasonic transducing module is open. The application has the advantages of high reliability, low failure rate, high safety, low maintenance cost and the like.

Description

Technical Field

[0001] This invention relates to the field of physiotherapy technology, and in particular to an ultrasonic physiotherapy system. Background Technology

[0002] Currently, ultrasonic therapy devices mainly consist of a power supply module, a control circuit module, an ultrasonic wave generation module, and an ultrasonic transducer module. The ultrasonic wave generation module typically uses a traditional voltage source drive circuit, amplifying the power through a power transistor (such as a MOSFET) to drive the transducer. However, this traditional architecture has the following problems: when the transducer is not connected or has poor contact, the drain voltage of the power transistor can surge to 2-3 times the power supply voltage, leading to avalanche breakdown and potentially damaging other electronic components. Existing ultrasonic therapy devices suffer from poor reliability, high failure rate, low safety, and high maintenance costs. Therefore, it is essential to design an ultrasonic therapy system to solve the aforementioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems and shortcomings, and to provide an ultrasonic physiotherapy system with advantages such as high reliability, low failure rate, high safety and low maintenance cost.

[0004] The technical solution of this invention is implemented as follows: An ultrasonic physiotherapy system includes a power supply module, a signal generation module, a single-tube power amplifier module, and an ultrasonic transducer module electrically connected in sequence. The system is characterized in that the drain of the power tube in the single-tube power amplifier module is connected to the positive terminal of a DC power supply via a first inductor, forming a power supply structure; the drain of the power tube in the single-tube power amplifier module is connected to the ultrasonic transducer module via a second inductor; the second inductor and the equivalent capacitance of the ultrasonic transducer module form a series resonant network; and the inductive reactance of the first inductor is configured to limit the average drain current of the power tube in the single-tube power amplifier module within a safe threshold when the ultrasonic transducer module is open-circuited.

[0005] Preferably, the ultrasonic physiotherapy system further includes a thermal stability compensation module and a central processing module. The power supply module and the signal generation module are electrically connected to the central processing module, and the thermal stability compensation module is connected in series between the central processing module and the ultrasonic transducer module.

[0006] Preferably, a driving module is connected in series between the signal generation module and the single-tube power amplifier module, and the driving module is connected to the positive terminal of the DC power supply of the power supply module, and is also electrically connected to the central processing module; a current loop module is connected in series between the signal generation module and the single-tube power amplifier module; and a voltage loop module is connected in series between the signal generation module and the ultrasonic transducer module.

[0007] Preferably, the ultrasonic physiotherapy system further includes a handheld shell. The signal generation module, single-tube power amplifier module, ultrasonic transducer module, first inductor, and second inductor together constitute an ultrasonic action module. A heat dissipation channel for installing the power supply module is opened on the tail end face of the handheld shell, and the heat dissipation channel extends to the side wall of the front end of the handheld shell. The ultrasonic action module is disposed on the front end of the handheld shell, and the rear end of the ultrasonic action module passes through the front end of the heat dissipation channel. A cooling fan is disposed in the heat dissipation channel.

[0008] Preferably, the handheld housing includes a front cover, a rear cover, and a handheld cylinder with openings at both ends. The inner hole of the handheld cylinder forms an installation channel for installing the power module and the central processing module. The front cover is fitted onto the front port of the handheld cylinder, and the ultrasonic action module is mounted on the front cover. The rear cover is fitted onto the rear port of the handheld cylinder. A first ventilation hole penetrating into the installation channel is provided on the outer wall of the rear cover, and a second ventilation hole penetrating into the installation channel is provided on the side wall of the front end of the handheld cylinder. The second ventilation hole, the first ventilation hole, and the installation channel together form a heat dissipation channel.

[0009] Preferably, the handheld cylinder includes two snap-fit ​​shells that snap together, the mounting channel is formed between the two snap-fit ​​shells, the front cover is fitted onto the front ends of both snap-fit ​​shells, the rear cover is fitted onto the rear ends of both snap-fit ​​shells, and a second ventilation hole penetrating into the mounting channel is opened on the outer wall of the front end of at least one snap-fit ​​shell.

[0010] Preferably, the front end of the handheld housing is a detachable front cover, and a positioning groove is provided on the handheld housing inside the front cover. The ultrasonic transducer module is disposed at the bottom of the positioning groove. The ultrasonic action module also includes a soft contact that is detachably embedded in the positioning groove, and the soft contact is pressed on the ultrasonic transducer module, pressed by the front cover, and extends out to the rear cover.

[0011] Preferably, the front cover is an annular cover, which presses against the soft contact and allows the outer end of the soft contact to pass through the inner hole of the front cover.

[0012] Preferably, the front end of the handheld shell has a plurality of axial notches arranged side by side around its end, and radial notches are respectively provided on the sidewalls of the axial notches in the same direction. The bottom and / or wall of the radial notches are provided with limiting protrusions, and limiting grooves are formed between the limiting protrusions and the inner end face of the radial notches. The inner wall of the front cover has a plurality of snap-fit ​​protrusions that are equal in number and correspond one-to-one with the axial notches. The snap-fit ​​protrusions can be inserted into the limiting grooves after passing through the ports of the axial notches and the radial notches in sequence.

[0013] Preferably, the rear channel opening of the installation channel is provided with an embedding groove, and the cooling fan is disposed on the embedding groove.

[0014] The beneficial effects of this invention are as follows: In this ultrasonic physiotherapy system, the drain of the power transistor in the single-transistor power amplifier module is connected to the positive terminal of the DC power supply through a first inductor, forming a power supply structure; the drain of the power transistor in the single-transistor power amplifier module is connected to the ultrasonic transducer module through a second inductor; the second inductor and the equivalent capacitance of the ultrasonic transducer module form a series resonant network; the inductive reactance of the first inductor is configured to limit the average drain current of the power transistor in the single-transistor power amplifier module within a safe threshold when the ultrasonic transducer module is open-circuited. This enables the ultrasonic physiotherapy system to have a very stable and reliable circuit structure, effectively reducing the failure rate and avoiding adverse situations such as excessive drain voltage and avalanche breakdown. The ultrasonic physiotherapy system has the advantages of high safety and long service life, and can effectively reduce maintenance costs. Attached Figure Description

[0015] Figure 1 This is a circuit diagram of the ultrasonic physiotherapy system in this invention.

[0016] Figure 2 This is a circuit diagram of the ultrasonic transducer drive circuit and current feedback loop in this invention.

[0017] Figure 3 This is a circuit diagram of the voltage loop feedback circuit in this invention.

[0018] Figure 4 This is one of the three-dimensional structural schematic diagrams of the ultrasonic physiotherapy system in this invention.

[0019] Figure 5 This is the second three-dimensional structural schematic diagram of the ultrasonic physiotherapy system in this invention.

[0020] Figure 6 This is one of the schematic diagrams showing the disassembled structure of the ultrasonic physiotherapy system in this invention.

[0021] Figure 7 This is the second schematic diagram showing the disassembled structure of the ultrasonic physiotherapy system in this invention.

[0022] Figure 8 This is one of the schematic diagrams showing the disassembled structure of the handheld cylinder in this invention.

[0023] Figure 9 This is the second schematic diagram of the disassembled structure of the handheld cylinder in this invention.

[0024] Figure 10 This is one of the three-dimensional structural diagrams of the soft contact in this invention.

[0025] Figure 11This is the second three-dimensional structural diagram of the soft contact in this invention. Detailed Implementation

[0026] like Figures 1 to 3 As shown, the ultrasonic physiotherapy system of the present invention includes a power supply module 100, a signal generation module 200, a single-tube power amplifier module 300, and an ultrasonic transducer module 400 connected together in sequence. To achieve the purpose of the present invention, the drain of the power tube of the single-tube power amplifier module 300 is connected to the positive terminal of the DC power supply through a first inductor 500 to form a power supply structure; the drain of the power tube of the single-tube power amplifier module 300 is connected to the ultrasonic transducer module 400 through a second inductor 600; the second inductor 600 and the equivalent capacitance of the ultrasonic transducer module 400 form a series resonant network; the inductive reactance of the first inductor 500 is configured to limit the average drain current of the power tube of the single-tube power amplifier module 300 within a safe threshold when the ultrasonic transducer module 400 is open-circuited.

[0027] In this ultrasonic physiotherapy system, the drain of the power transistor in the single-transistor power amplifier module 300 is connected to the positive terminal of the DC power supply via a first inductor 500, forming a power supply structure. The drain of the power transistor in the single-transistor power amplifier module 300 is connected to the ultrasonic transducer module 400 via a second inductor 600. The second inductor 600 and the equivalent capacitance of the ultrasonic transducer module 400 form a series resonant network. The inductive reactance of the first inductor 500 is configured to limit the average drain current of the power transistor in the single-transistor power amplifier module 300 within a safe threshold when the ultrasonic transducer module 400 is open-circuited. This enables the ultrasonic physiotherapy system to have a very stable and reliable circuit structure, effectively reducing the failure rate and avoiding adverse situations such as excessive drain voltage and avalanche breakdown. The ultrasonic physiotherapy system has the advantages of high safety and long service life, and can effectively reduce maintenance costs.

[0028] like Figures 1 to 3 As shown, the above circuitry in this ultrasonic therapy system enables no-load self-protection. The power supply module 100 is a DC power supply module; the single-transistor power amplifier module 300 uses a single-transistor N-channel MOSFET as the power switch, with its drain connected to the positive terminal of the power supply module 100 via a first inductor 500, forming a parallel feeding structure. This structure allows the power transistor to operate approximately in current source mode. The drain output of the single-transistor power amplifier module 300 is connected in series with a second inductor 600 to the ultrasonic transducer module 400. The ultrasonic transducer module 400 exhibits capacitive behavior near its resonant frequency, forming a series resonant network with the second inductor 600.

[0029] Protection Mechanism Description: When the ultrasonic transducer module 400 is not connected, the load circuit is open. At this time, the inductive reactance ωL1 of the first inductor 500 limits the average drain current within a safe threshold (typically ≤10% of full load); the drain voltage swing of the single-tube power amplifier module 300 is limited by the resonant characteristics of the first inductor 500 and the output capacitor of the power tube, and the peak value is clamped within 1.3 times the power supply voltage, which is lower than the breakdown voltage (VDSS) of the power tube; the above protection function is achieved by the inherent characteristics of passive components, without the need for additional sensors, relays or active detection circuits.

[0030] Parameter matching relationship: The inductive reactance of the first inductor 500 should satisfy ωL1 >> R_load (usually taken as 5-10 times the load impedance). The second inductor 600 and the static capacitance C0 of the first inductor 500 are matched according to the following formula: f0=1 / 2π√L2.Cep≈640kHz.

[0031] like Figures 1 to 3 As shown, the first inductor 500 constitutes a feed inductor with a nominal inductance of 13uH, providing current source characteristics and limiting the no-load current. The second inductor 600 constitutes a resonant inductor with a nominal inductance of 28uH, forming an LC series resonance with CO. The single-tube power amplifier module has a 300V(BR)DSS≥150V / 3A, and can withstand the resonant voltage swing.

[0032] like Figures 1 to 3 As shown, the signal generation module 200 is a CD4046 phase-locked loop signal generation module. The signal generation module 200 uses the CD4046 phase-locked loop chip as its core to generate a fundamental frequency drive signal. The ultrasonic transducer module 400 is a focusing transducer, which helps to achieve better ultrasonic therapy effects.

[0033] like Figure 1 As shown, the ultrasonic physiotherapy system also includes a thermal stability compensation module 700 and a central processing module 800. The power supply module 100 and the signal generation module 200 are both electrically connected to the central processing module 800. The thermal stability compensation module 700 is connected in series between the central processing module 800 and the ultrasonic transducer module 400. The thermal stability compensation module 700 detects the output power of the power transistor and outputs a compensation voltage to the input terminal of the drive module 210 to suppress power output.

[0034] A temperature sensor (not shown in the figure) is connected to the central processing module 800 to fine-tune the output voltage of the drive module 210. Specifically, the temperature sensor detects the temperature of the ultrasonic transducer module 400 and feeds it back to the central processing module 800. The central processing module 800 then adjusts the duty cycle of the output voltage waveform of the drive module 210, thereby helping to further improve the reliability and applicability of the ultrasonic therapy system. No-load self-protection is achieved using the current source characteristics of a series inductor.

[0035] like Figure 1 As shown, a drive module 210 is connected in series between the signal generation module 200 and the single-tube power amplifier module 300, and the drive module 210 is connected to the positive terminal of the DC power supply of the power supply module 100, and also electrically connected to the central processing module 800; the signal generation module 200 is connected to the positive terminal of the DC power supply of the power supply module 100; a current loop module 220 is connected in series between the signal generation module 200 and the single-tube power amplifier module 300; and a voltage loop module 230 is connected in series between the signal generation module 200 and the ultrasonic transducer module 400. This makes the overall operation of the ultrasonic physiotherapy system more stable and coordinated, thereby helping to further improve the reliability and applicability of the ultrasonic physiotherapy system.

[0036] like Figures 1 to 3 As shown, the drive module 210 and the single-tube power amplifier module 300 together constitute the drive power amplifier module, and the single-tube power amplifier module 300 adopts a parallel feeding topology.

[0037] In the actual manufacturing process, the following methods are adopted: Figures 1 to 3 The circuit block diagram and circuit diagram shown demonstrate the construction of an electrical control system for a handheld focused ultrasound repair device with no-load self-protection and thermal stability compensation. This system offers the following advantages: Thermal stability: Temperature drift is suppressed through a compensation loop, resulting in minimal output power deviation between cold and hot operation. No-load safety: No additional protection circuit is required; the power transistor automatically enters a low-power safe state when the transducer is not connected, preventing no-load damage. Circuit simplicity: The two core inductors (L1, L2) simultaneously perform resonant matching and protection functions, resulting in a smaller number of components, making it suitable for miniaturization in handheld devices.

[0038] like Figures 4 to 9As shown, the ultrasonic therapy system also includes a handheld shell 1. The signal generation module 200, single-tube power amplifier module 300, ultrasonic transducer module 400, first inductor 500, and second inductor 600 together constitute the ultrasonic action module 2. A heat dissipation channel 11 for mounting the power supply module 100 and central processing module is provided on the tail end face of the handheld shell 1, extending through to the side wall of the front end of the handheld shell 1. The ultrasonic action module 2 is located on the front end of the handheld shell 1, with its rear end passing through the front end of the heat dissipation channel 11. A cooling fan 3 is installed in the heat dissipation channel 11. In this ultrasonic therapy system, the heat dissipation channel 11 is for mounting the power supply module 100 and central processing module, and the rear end of the ultrasonic action module 2 passes through the front end of the heat dissipation channel 11, which also houses a cooling fan 3. This not only facilitates the overall arrangement and electrical connection of the power module 100, central processing module, and ultrasonic action module 2, but also provides heat dissipation for the power module 100, central processing module, and ultrasonic action module 2. This results in a more comprehensive and effective heat dissipation effect, effectively preventing overheating, thereby reducing the aging rate of related components and extending their service life. It also reduces electrical faults, improves safety, and makes the user experience more comfortable.

[0039] like Figures 4 to 7 As shown, the handheld housing 1 includes a front cover 12, a rear cover 13, and a handheld cylinder 14 with openings at both ends. The inner hole of the handheld cylinder 14 forms an installation channel 141 for mounting the power module 100 and the central processing module 800. The front cover 12 is fitted onto the front port of the handheld cylinder 14, and the ultrasonic action module 2 is mounted on the front cover 12. The rear cover 13 is fitted onto the rear port of the handheld cylinder 14. A first ventilation hole 101 is formed on the outer wall of the rear cover 13, penetrating into the installation channel 141. A second ventilation hole 102 is formed on the side wall of the front end of the handheld cylinder 14, penetrating into the installation channel 141. The second ventilation hole 102, the first ventilation hole 101, and the installation channel 141 together form a heat dissipation channel 11. The installation channel 141 is used to mount the power module 100 and the central processing module 800. This handheld housing 1 not only has a simple and easy-to-manufacture structure, but also helps to further improve the reliability and applicability of the ultrasonic physiotherapy system.

[0040] like Figures 4 to 10As shown, the handheld cylinder 14 includes two snap-fit ​​shells 142, which are snapped together. An installation channel 141 is formed between the two snap-fit ​​shells 142. A front cover 12 is fitted onto the front ends of both snap-fit ​​shells 142, and a rear cover 13 is fitted onto the rear ends of both snap-fit ​​shells 142. A second ventilation hole 102, penetrating into the installation channel 141, is formed on the outer wall of at least one of the front ends of the snap-fit ​​shell 142. This not only gives the handheld cylinder 14 a simple and easy-to-manufacture structure, but also greatly facilitates the installation and positioning of the power module 100 and the central processing module 800. Furthermore, the front cover 12 and the rear cover 13 provide stable positioning for the assembly of the two snap-fit ​​shells 142, effectively enhancing the stability and reliability of the handheld shell 1 assembly, and further improving the reliability and applicability of the ultrasonic therapy system.

[0041] like Figure 9 and Figure 10 As shown, the snap-fit ​​housing 142 is a groove-shaped snap-fit ​​housing with a U-shaped radial cross-section. Such a snap-fit ​​housing 142 has a very simple and harmonious structure, which facilitates the installation and positioning of the power module 100 and the central processing module 800 while being easy to manufacture, thereby helping to further improve the reliability and applicability of the snap-fit ​​housing 142.

[0042] like Figure 5 , Figure 7 and Figure 8 As shown, each of the two snap-fit ​​shells 142 has a front notch 103 on its outer wall. When the two snap-fit ​​shells 142 are snapped together, the front notches 103 on the two snap-fit ​​shells 142 together form a front annular groove 104 for the front cover 12 to be fitted. The front cover 12 is fitted into the front annular groove 104, and the outer wall of the front cover 12 smoothly transitions with the outer wall of the snap-fit ​​shell 142. This not only improves the accuracy and stability of the installation and positioning of the front cover 12, but also ensures that the overall shape of the handheld shell 1 is more harmonious and suitable, which helps to improve the comfort of use.

[0043] like Figure 5 , Figure 7 and Figure 8 As shown, each of the two snap-fit ​​shells 142 has a rear notch 105 on its outer wall at the rear end. When the two snap-fit ​​shells 142 are snapped together, the rear notches 105 on the two snap-fit ​​shells 142 together form a rear annular groove 106 for the rear cover 13 to be fitted. The rear cover 13 is fitted into the rear annular groove 106, and the outer wall of the rear cover 13 smoothly transitions with the outer wall of the snap-fit ​​shell 142. This not only improves the accuracy and stability of the installation and positioning of the rear cover 13, but also ensures that the overall shape of the handheld shell 1 is more harmonious and suitable, which helps to improve the comfort of use.

[0044] After the rear cover 13 is assembled, it can be secured to the snap-fit ​​shell 142 with screws (not shown in the figure). This helps to further improve the stability and reliability of the rear cover 13 assembly, and thus further improves the reliability and applicability of the handheld shell 1.

[0045] like Figures 7 to 9 As shown, the first ventilation hole 101 and the second ventilation hole 102 can be one or more. One of the fastening housings 142 has a second ventilation hole 102 extending through the mounting channel 141 on its outer wall at the front end. The other fastening housing 142 is equipped with a display screen 30 and operation buttons 40 electrically connected to the central processing module 800. This design ensures adequate heat dissipation while facilitating user operation and preventing internal components from affecting heat dissipation, thus contributing to further improvements in the reliability and applicability of the ultrasonic therapy system.

[0046] like Figure 9 As shown, any one of the snap-fit ​​shells 142 is provided with a charging interface 50 that is electrically connected to the central processing module 800, which facilitates the charging of the power module 100.

[0047] like Figures 7 to 9 As shown, one of the snap-fit ​​shells 142 has a strip-shaped snap-fit ​​groove 1421 extending along its snap-fit ​​edge, and the other snap-fit ​​shell 142 has a strip-shaped protrusion 1422 matching the strip-shaped snap-fit ​​groove 1421 on its snap-fit ​​edge. The strip-shaped protrusion 1422 is embedded in the strip-shaped snap-fit ​​groove 1421. This allows the two snap-fit ​​shells 142 to be snapped together more fully and stably, which helps to improve the stability and reliability of the handheld shell 1 assembly, thereby further improving the reliability and applicability of the ultrasonic physiotherapy system.

[0048] like Figures 7 to 9 As shown, one of the fastening shells 142 is provided with a plurality of buckle protrusions 1423, and each buckle protrusion 1423 is provided with at least one fastening hole 1424. The inner edge of the fastening shell 142 is provided with a number of insertion notches 1425 that correspond one-to-one with the buckle protrusions 1423. The opening wall of each insertion notch 1425 is provided with a number of fastening teeth 1426 that correspond one-to-one with the fastening holes 1424 on the buckle protrusions 1423. The buckle protrusions 1423 are inserted into the corresponding insertion notches 1425, and the fastening holes 1424 on the buckle protrusions 1423 are fastened to the fastening teeth 1426. The engagement of the buckle protrusion 1423 with the insertion notch 1425 and the buckle hole 1424 with the buckle tooth 1426 can greatly enhance the convenience and reliability of assembling the two snap-fit ​​shells 142, thereby helping to further improve the reliability of the handheld shell 1.

[0049] like Figure 4 and Figure 6 As shown, the front end of the handheld shell 1 is a detachable front cover 12. A positioning groove 121 is formed on the inner side of the handheld shell 1 within the front cover 12. The ultrasonic transducer module 22 is disposed at the bottom of the positioning groove 121. The ultrasonic action module 2 also includes a soft contact 21 detachably embedded in the positioning groove 121, pressing the soft contact 21 against the ultrasonic transducer module 22, being held in place by the front cover 12, and extending beyond the rear cover 13. The soft contact 21 allows for flexible contact with the human body; pressing the soft contact 21 against the ultrasonic transducer module 22 ensures stable ultrasonic action; thus, while improving user comfort, it ensures stable and effective therapeutic performance. The positioning groove 121 and the front cover 12 work together to accurately and stably position the soft contact 21, ensuring that the installation and positioning of the soft contact 21 is very stable and reliable, and thus ensuring that the soft contact 21 can stably contact the human body. Furthermore, the soft contact 21 can be disassembled by removing the front cover 12, which allows users to select different shapes of soft contact 21 according to their actual needs, thereby meeting more diverse usage requirements and further improving the applicability of the ultrasonic physiotherapy system.

[0050] like Figure 6 As shown, the positioning groove 121 is a stepped port groove on the front port of the handheld cylinder 14, which is larger on the outside and smaller on the inside. This facilitates accurate and stable installation and positioning of the soft contact 21 by the user, thereby helping to further improve the accuracy and stability of the installation and positioning of the soft contact 21, and thus enabling the soft contact 21 to exert a more stable and reliable therapeutic effect. Furthermore, this allows the installation space of the ultrasonic transducer module 22 to be directly connected to the heat dissipation channel 11, which further improves heat dissipation performance.

[0051] A temperature detection module (not shown in the figure) electrically connected to the central processing module 800 is disposed at the front end of the handheld barrel 14, and is positioned close to the ultrasonic transducer module 22. The temperature detection module is used to monitor whether the ultrasonic transducer module 22 is overheating. The front end of the handheld barrel 14 has an mounting hole (not shown in the figure) for the temperature detection module to be installed, which facilitates accurate and stable positioning of the temperature detection module. When a high temperature is detected, the central processing module 800 stops the ultrasonic transducer module 2 from working, thus providing overheat protection and improving user comfort and safety.

[0052] like Figure 4 and Figure 6As shown, the front cover 12 is an annular cover that presses against the soft contact 21, with the outer end of the soft contact 21 protruding through the inner hole of the front cover 12. This not only gives the front cover 12 a simple and reliable structure, but also facilitates a more stable and reliable positioning of the soft contact 21, thereby helping to further improve the reliability and applicability of the ultrasonic physiotherapy system.

[0053] like Figure 6 , Figure 10 and Figure 11 As shown, the soft contact 21 is a disc-shaped soft contact with a smaller outer end and a larger inner end. The soft contact 21 can be made into different shapes according to different usage requirements. For example, in actual manufacturing and use, the soft contact 21 can be made with different thicknesses. This allows for adjustment of the therapeutic depth by replacing the soft contact 21 with different thicknesses, thereby improving the therapeutic effect and comfort. The front cover 12 is a cover with a smaller outer end and a larger inner end. The inner wall of the front cover 12 presses against the larger end of the soft contact 21. In this way, the front cover 12 can stably and reliably perform a spin-pressing positioning function on the soft contact 21, thereby effectively improving the stability and reliability of the soft contact 21's installation and positioning, and thus enabling the soft contact 21 to exert a very stable and reliable contact effect on the human body.

[0054] like Figure 6 As shown, at least one anti-slip groove 120 is provided on the outer wall of the front cover 12, which makes the rotation and disassembly of the front cover 12 more convenient and stable, thereby helping to further improve the convenience of replacing and maintaining the soft contact 21.

[0055] like Figures 5 to 7 As shown, the front end of the handheld outer shell 1 has several axial notches 15 arranged side by side around its end. Radial notches 151 are respectively formed on the sidewalls of each axial notch 15 in the same direction. Limiting protrusions 152 are provided on the bottom and / or wall of the radial notches 151. A limiting groove 153 is formed between the limiting protrusions 152 and the inner end face of the radial notch 151. The inner wall of the front cover 12 has several locking protrusions 122, equal in number and corresponding in position to the axial notches 15. The locking protrusions 122 can sequentially pass through the ports of the axial notches 15 and radial notches 151 and then be fitted into the limiting groove 153. In this way, the front cover 12 can be quickly and stably installed and positioned. This not only improves the convenience of assembling and disassembling the front cover 12, but also improves the stability and reliability of the installation and positioning of the front cover 12, thereby helping to further improve the reliability of the ultrasonic physiotherapy system.

[0056] like Figures 5 to 7As shown, the snap-fit ​​protrusion 122 enters the limiting groove 153 by pressing the limiting protrusion 152. When the snap-fit ​​protrusion 122 is pressed against the limiting protrusion 152, it is in an interference fit. Then, when the snap-fit ​​protrusion 122 enters the positioning groove 121, the positioning groove 121 can position the snap-fit ​​protrusion 122, thereby realizing the installation and positioning of the front cover 12. To ensure the smooth passage of the snap-fit ​​protrusion 122 through the limiting protrusion 152, a guide slope is provided on the side wall where they contact.

[0057] like Figure 7 and Figure 9 As shown, the rear channel opening of the mounting channel 141 is provided with an embedding groove 143, and the cooling fan 3 is mounted on the embedding groove 143. This not only facilitates the stable and reliable positioning of the cooling fan 3, but also enables the cooling fan 3 to exert a stable and reliable heat dissipation effect, thereby helping to further improve the reliability and applicability of the ultrasonic physiotherapy system.

[0058] like Figures 6 to 9 As shown, the cooling fan 3, power module 100, and ultrasonic actuation module 2 are arranged side-by-side in the heat dissipation channel 11 from back to front. The central processing module 800 is mounted on the channel wall of the heat dissipation channel 11. Common airflow channels are reserved between the power module 100 and the central processing module 800, and between the ultrasonic actuation module 2 and the central processing module 800. This ensures accurate and stable airflow through the power module 100, central processing module 800, and ultrasonic actuation module 2 when the cooling fan 3 is operating, achieving a comprehensive, stable, and reliable heat dissipation effect. This effectively prevents overheating, reduces the aging rate of related components, extends their service life, reduces electrical faults, improves safety, and enhances user comfort.

[0059] like Figures 6 to 9 As shown, except for the ultrasonic transducer module 400 which is located at the front port of the handheld cylinder 14, the rest of the ultrasonic action module 2 is located in the installation channel 141, which is located in the heat dissipation channel 11. This can help to achieve a very stable and reliable heat dissipation effect on the ultrasonic action module 2.

[0060] like Figure 6 and Figure 7 As shown, gripping grooves 16 are provided on two mutually spaced sidewalls of the handheld housing 1. This helps to ensure that the handheld housing 1 meets the volume requirements for the installation of internal components while effectively facilitating user gripping and operation, thereby further improving the ease of use of the ultrasonic physiotherapy system.

[0061] The above embodiments are preferred embodiments of the present invention. Any structures similar to those of the present invention and equivalent changes thereof should fall within the protection scope of the present invention.

Claims

1. An ultrasonic physiotherapy system, comprising a power supply module (100), a signal generation module (200), a single-tube power amplification module (300), and an ultrasonic transducer module (400) connected together in sequence, characterized in that: The drain of the power transistor in the single-transistor power amplifier module (300) is connected to the positive terminal of the DC power supply through a first inductor (500) to form a power supply structure; the drain of the power transistor in the single-transistor power amplifier module (300) is connected to the ultrasonic transducer module (400) through a second inductor (600); the second inductor (600) and the equivalent capacitance of the ultrasonic transducer module (400) form a series resonant network, and the inductive reactance of the first inductor (500) is configured to limit the average drain current of the power transistor in the single-transistor power amplifier module (300) within a safe threshold when the ultrasonic transducer module (400) is open.

2. The ultrasonic physiotherapy system according to claim 1, characterized in that: It also includes a thermal stability compensation module (700) and a central processing module (800). The power supply module (100) and the signal generation module (200) are electrically connected to the central processing module (800). The thermal stability compensation module (700) is connected in series between the central processing module (800) and the ultrasonic transducer module (400).

3. The ultrasonic physiotherapy system according to claim 2, characterized in that: A drive module (210) is connected in series between the signal generation module (200) and the single-tube power amplifier module (300), and the drive module (210) is connected to the positive terminal of the DC power supply of the power supply module (100), and the drive module (210) is also electrically connected to the central processing module (800); a current loop module (220) is connected in series between the signal generation module (200) and the single-tube power amplifier module (300); a voltage loop module (230) is connected in series between the signal generation module (200) and the ultrasonic transducer module (400).

4. The ultrasonic physiotherapy system according to claim 1, characterized in that: It also includes a handheld housing (1), and the signal generation module (200), single tube power amplifier module (300), ultrasonic transducer module (400), first inductor (500), and second inductor (600) together constitute an ultrasonic action module (2). The end face of the handheld housing (1) is provided with a heat dissipation channel (11) for the installation of the power supply module (100), and the heat dissipation channel (11) extends through to the side wall of the front end of the handheld housing (1). The ultrasonic action module (2) is set on the front end of the handheld housing (1), and the rear end of the ultrasonic action module (2) is inserted into the front end of the heat dissipation channel (11). A cooling fan (3) is provided in the heat dissipation channel (11).

5. The ultrasonic physiotherapy system according to claim 4, characterized in that: The handheld housing (1) includes a front cover (12), a rear cover (13), and a handheld cylinder (14) with openings at both ends. The inner hole of the handheld cylinder (14) forms an installation channel (141) for the installation of the power module (100) and the central processing module (800). The front cover (12) is fitted onto the front port of the handheld cylinder (14). The ultrasonic action module (2) is mounted on the front cover (12). The rear cover (13) is fitted onto the rear port of the handheld cylinder (14). A first ventilation hole (101) is opened on the outer wall of the rear cover (13) and extends into the installation channel (141). A second ventilation hole (102) is opened on the side wall of the front end of the handheld cylinder (14) and extends into the installation channel (141). The second ventilation hole (102), the first ventilation hole (101), and the installation channel (141) together form a heat dissipation channel (11).

6. The ultrasonic physiotherapy system according to claim 5, characterized in that: The handheld cylinder (14) includes two snap-fit ​​shells (142) that snap together. The mounting channel (141) is formed between the two snap-fit ​​shells (142). The front cover (12) is fitted onto the front end of both snap-fit ​​shells (142), and the rear cover (13) is fitted onto the rear end of both snap-fit ​​shells (142). A second ventilation hole (102) is opened on the outer wall of the front end of at least one snap-fit ​​shell (142) and extends into the mounting channel (141).

7. The ultrasonic physiotherapy system according to claim 4, characterized in that: The front end of the handheld shell (1) is a detachable front cover (12). A positioning groove (121) is provided on the handheld shell (1) inside the front cover (12). The ultrasonic transducer module (22) is located at the bottom of the positioning groove (121). The ultrasonic action module (2) also includes a soft contact (21) that is detachably embedded in the positioning groove (121), and the soft contact (21) is pressed on the ultrasonic transducer module (22). The soft contact (21) is also pressed by the front cover (12) and the soft contact (21) extends out to the rear cover (13).

8. The ultrasonic physiotherapy system according to claim 7, characterized in that: The front cover (12) is an annular cover. The front cover (12) is pressed against the soft contact (21) and the outer end of the soft contact (21) passes through the inner hole of the front cover (12).

9. The ultrasonic physiotherapy system according to claim 8, characterized in that: The front end of the handheld casing (1) is provided with a plurality of axial notches (15) arranged side by side around its end. Radial notches (151) are provided on the sidewalls of each axial notch (15). Limiting protrusions (152) are provided on the bottom and / or wall of the radial notch (151). A limiting groove (153) is formed between the limiting protrusion (152) and the inner end face of the radial notch (151). A plurality of swivel protrusions (122) are provided on the inner wall of the front cover (12) in the same number and in the same position as the axial notches (15). The swivel protrusions (122) can be inserted into the limiting groove (153) after passing through the ports of the axial notches (15) and the radial notches (151) in sequence.

10. The ultrasonic physiotherapy system according to claim 5, characterized in that: An insert groove (143) is provided on the rear channel opening of the installation channel (141), and the cooling fan (3) is installed on the insert groove (143).

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